Fire Sensor May Falsely Detect Fires – 2018-2023 Prevost H3-45 Motor Coaches & H3-45 VIP Motorhomes

SEOCONTENT-START

US interim recall notif letter
PREVOST SAFETY RECALL SR23-05
NHTSA SAFETY RECALL # 23V-126
April 2023
«customer» «groupe»-«code» SR23-05
«add» «po»
«city», «st» «zip»
USA
IMPORTANT SAFETY RECALL
This notice applies to your vehicle(s), see VIN list below.
Dear Customer,
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Prevost Car US Inc. has decided that a defect which relates to motor vehicle safety exists in certain 2018 – 2023 H3-45 Coaches, 2019 H3-41 Coaches & certain 2018 – 2023 H3-45 VIP Motorhomes.
DEFECT DESCRIPTION
Automatic Fire Suppression System (AFSS)
On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
SAFETY RISK
An unexpected loss of drive power, caused by an unwarranted Automatic Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of drive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries.
INTERIM NOTICE
We are currently preparing the remedy. We will notify you again when the remedy is ready.
US interim recall notif letter
IDENTIFICATION OF ANY WARNING THAT CAN PRECEDE
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown.
REMEDY PROGRAM
When the solution is ready, Prevost will provide a repair procedure to remedy the affected vehicle population. All costs associated with this inspection & repair will be covered by Prevost.
According to our records, you are the registered owner of the following vehicles involved in this safety recall SR23-05:
«VIN1»
«VIN5»
«VIN9»
«VIN13»
«VIN17»
«VIN21»
«VIN25»
«VIN2»
«VIN6»
«VIN10»
«VIN14»
«VIN18»
«VIN22»
«VIN26»
«VIN3»
«VIN7»
«VIN11»
«VIN15»
«VIN19»
«VIN23»
«VIN27»
«VIN4»
«VIN8»
«VIN12»
«VIN16»
«VIN20»
«VIN24»
«VIN28»
WHAT YOU NEED TO DO
We appreciate your patience while we are preparing the remedy. You will receive a second owner notification when the solution is available.
NOTICE REGARDING LEASED VEHICLES
If you are a Lessor of vehicles subject to this Notice, you have an obligation under Federal Law to send a copy of this Notice to all Lessees within 10 days.
PRE-NOTIFICATION REMEDIES
If you have previously paid for repairs as a result of this issue, you may be entitled to recovery of those expenses. Prevost Car US will reimburse the claimant by check for the reasonable amount paid for repairs (i.e. the cost of parts, labor, disposal fees and taxes) that addressed the defect as stated in the safety recall notification. To qualify, repairs must have been completed no earlier than one year prior to the release of the recall and no later than 10 days after the release of the recall mailing of the initial customer notification letter pertaining to the recall. To get reimbursed, please file an online warranty claim following normal Campaign procedures if you are a registered customer, otherwise, contact the Prevost Warranty Department at 1-866-870-2046 for reimbursement instructions.
REIMBURSEMENT OF PRE-NOTIFICATION REMEDIES
When a Prevost vehicle is affected by a safety recall and the owner/purchaser (claimant)
US interim recall notif letter
has the safety-related defect or FMVSS regulatory noncompliance remedied at their own expense prior to receiving the manufacturer notification of the safety recall, Prevost Car (US) Inc. will reimburse the owner/purchaser for the reasonable amount paid (i.e. the cost of parts, labor, disposal fees and taxes) that addressed the safety-related defect or FMVSS regulatory noncompliance as described in the safety recall notification. To qualify, repairs must have been completed no earlier than one year prior to the release of the safety recall (notification to the government) and no later than 10 days after the last mailing of the initial customer notification letter pertaining to the recall. To get reimbursed, please file an online warranty claim following normal campaign procedure if you are a registered customer, otherwise, please contact the Prevost Warranty Department at 1-866-870-2046 for reimbursement instructions.
CHANGE OF ADDRESS OR OWNERSHIP
If your address has changed, or you no longer own the vehicle(s), please help us update our records. Use the link below to access the Prevost Warranty Support web page https://prevostcar.com/contact/warranty
Click on the link ‘Change of address or ownership’, fill the form, save it and email the file to prevost.warranty@volvo.com
ASSISTANCE
If you need assistance, please contact your nearest Prevost Service Center. You will find the Prevost Parts & Service Centers location at this address:
https://prevostcar.com/contact/parts-service-center
COMPLAINTS
You may submit a complaint if you believe that Prevost Car US has failed or is unable to remedy the defect without charge or within a reasonable time.
You may submit the complaint to the Administrator of the National Highway Traffic Safety Administration located at 1200 New Jersey Avenue SE, Washington, DC 20590, USA or call the toll-free Vehicle Safety Hotline at: 1-888-327-4236, (TTY): 1-800-424-9153) or go to http://www.safercar.gov
We regret any inconvenience this may cause to your operations but hope you will appreciate our sincere efforts to demonstrate Prevost’s commitment to provide our customers with the best possible product.
Truly yours,
US interim recall notif letter
Prevost Service Team

**************************************************************************************************************

Writer: mg
SAFETY
RECALL
SR23-05
DATE :
September 2023
SECTION : 23 ACCESSORIES
SUBJECT:
AFSS OPTICAL SENSOR CORROSION
First Release
09-05-2023
APPLICATION
NOTICE TO SERVICE CENTERS
Verify vehicle eligibility by checking warranty bulletin status with SAP or via ONLINE WARRANTY SYSTEM available on Service / Warranty tab of Prevost website.
Model
VIN
H3-41, H3-45 coaches
Model Year: 2018 – 2023
From 2PCH33493JC710086 up to 2PCH3349XPC721451 incl.
H3-45 VIP motorhomes
Model Year: 2018 – 2023
From 2PCVS3495JC710113 up to 2PCVS3492PC721420 incl.
This Safety Recall does not necessarily apply to all the above-mentioned vehicles. Some vehicles may also have been modified before delivery. The owners of the vehicles affected by this recall will be advised by a letter indicating the Vehicle Identification Number (VIN) of each vehicle concerned.
DESCRIPTION
On vehicles affected by this recall, corrosion between the lower automatic fire suppression system (AFSS) optical sensor (in engine compartment) and its bracket could damage the sensor’s housing and allow water to ingress, ultimately causing the sensor to malfunction.
Therefore, on the affected vehicles, the lower AFSS optical sensor must be removed from the bracket, inspected for corrosion and replaced as needed. Upon reinstallation, nylon spacers must be inserted between the sensor and the bracket to provide a gap that will eliminate future corrosion problem (caused by road grime and humidity accumulation) at the back of the sensor.
SR23-05
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Writer: mg
MATERIAL
Order kit SR23-05 which contains the following parts:
Part No.
Description
Qty
505045
Nylon Spacer
2
Other parts that may be required:
Part No.
Description
Qty
563457
FIRE SENSOR PM-3M
1
NOTE
Material can be obtained through regular channels.
SAFETY PRECAUTIONS
• Eye protection should always be worn when working in a shop.
• Rules for Personal Protection Equipment should always be respected. Wear your PPE including but not limited to the following:
Safety First!
PROCEDURE
DANGER
Park vehicle safely, apply parking brake, stop the engine. Prior to working on the vehicle, set the ignition switch to the OFF position and trip the main circuit breakers equipped with a trip button. On Commuter type vehicles, set the battery master switch (master cut-out) to the OFF position.
Lockout & Tag out (LOTO) must be performed during set-up, maintenance or repair activities. Refer to your local procedure for detailed information regarding the control of hazardous energy.
SR23-05
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Writer: mg
1. Cut the vehicle electrical power.
• Trip the CB2 and CB6 resettable breakers (rear junction box).
• Disconnect the vehicle AFSS extinguisher.
• Make sure that the AFSS control panel in the driver’s area is off and not showing any lights.
2. Locate the lower AFSS optical sensor in the engine compartment (recent H3 model shown).
NOTE : On older models, the sensor is located on the same side but lower near the bumper curve.
SR23-05
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Writer: mg
3. Remove the sensor from the support bracket.
• Remove screws and nuts
• Do not discard hardware
4. Inspect the backside of the sensor looking for sign of corrosion at the cover seam.
*** USE THE SENSOR REPLACEMENT GUIDE AT THE END OF THIS PROCEDURE TO HELP BAD SENSOR IDENTIFICATION ***
• Look for excess of aluminum oxide, a white (sometimes greenish) dusty looking material.
• If aluminum oxide is found and it is touching the seam of the backside cover, the sensor must be replaced.
• Superficial black spots (small crater) are ok unless they create a noticeably deep crevice at the seam area.
AREA OF THE SENSOR BACKSIDE THAT MUST BE FREE OF CORROSION (WHITE ALUMINUM OXIDE POWDER)
5. If the sensor is corroded, it must be replaced. Unplug the sensor two connectors under the bracket.
• Remove all cable ties.
• Unplug the connectors.
*** DO NOT DISCARD THE OLD SENSOR***
• Return the sensor for warranty.
SR23-05
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Writer: mg
6. Clean the bracket mounting surface.
• Use cleaner/degreaser on a clean shop rag and scrub the bracket surface to remove road grime and oxidation.
• If the old sensor is going to be reinstalled, also clean the backside of the sensor.
NOTE : do not clean the front optical part of the sensor with strong degreaser or petroleum products.
7. Reinstall (or install a new sensor, as required) the sensor on the bracket adding the supplied 505045 nylon spacers between the sensor and the bracket.
• Reuse mounting hardware (screws and nyloc nuts).
SR23-05
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Writer: mg
8. With new sensor, reconnect and secure the two connectors with cable ties under the bracket.
9. Check for proper AFSS function.
• Reconnect the AFSS extinguisher.
• Reset the CB2 and CB6 circuit breakers.
• Start the vehicle.
• Make sure that the AFSS control panel in the driver’s area is showing a constant green light.
PARTS DISPOSITION
All replaced parts must be returned to Prevost according to the Return Shipping Instructions available on www.prevostcar.com (under service / warranty section) for full reimbursement. A copy of the warranty claim form must be enclosed with the shipment.
Discard waste according to applicable environmental regulations (Municipal/State[Prov.]/ Federal)
SR23-05
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Writer: mg
SENSOR REPLACEMENT GUIDE
SUPERFICIAL BLACK SPOTS ARE OK – CLEAN & REINSTALL
WHITE CORROSION AT ONE EDGE – REPLACE
WHITE SPOT FORMING BUT NOT TOUCHING THE COVER SEAM – CLEAN & REINSTALL
WHITE CORROSION ALL AROUND THE COVER – REPLACE
SENSOR COVER DIRTY AND ROUGH BUT SMALL WHITE SPOT NOT TOUCHING THE EDGE – CLEAN & REINSTALL
BACK SIDE COVERED BY CORROSION – REPLACE
SR23-05
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Writer: mg
WARRANTY
This modification is covered by Prevost’s normal warranty. We will reimburse you the parts and 1/2 hour (0.5) of labor upon receipt of the defective part and a completed A.F.A. Please submit claim via our Online Warranty System, available at www.prevostcar.com (under service \ warranty section). Use Claim Type: “Bulletin/Recall” and select ‘’Safety Recall 0BSR23-05 “.
Should you only wish to close the safety recall (without reimbursement), fill-in the ‘’Safety Recall Certification Sheet’’ provided with this bulletin and return it to our warranty department by Email at prevost.onlinewarranty@volvo.com or by fax at 418-831-9301.
OTHER
VBC Bulletin
N/A
Access all our Service Bulletins on http://techpub.prevostcar.com/en/
or scan the QR-Code with your smart phone.
E-mail us at technicalpublications_prev@volvo.com and type “ADD” in the subject to receive our warranty bulletins by e-mail.
Fail Code
23.15
Defect Code
09
Syst.Cond
R
Causal Part
563457
Writer: mg
VEHICLE SERIAL NUMBER:
PERFORMED BY
OWNER/OPERATOR
We hereby certify that Safety Recall Instructions with regard to Safety Recall SR23-05 have been performed.
Name:
Name:
Addr:
Addr:
Phone:
Phone:
Fax:
Fax:
Signature :
Signature :
Date:
Date:
If the information mentioned above is incorrect or you are not the owner of this vehicle anymore, please fill this section and return to sender.
NEW OWNER:
BUSINESS:
ADDRESS (including County):
Safety Recall
Certification Sheet
(Ref: SR23-05 )
Writer: mg
TELEPHONE:
FAX:
Please return this completed document with your A.F.A. form

**************************************************************************************************************

US recall notif letter
PREVOST SAFETY RECALL SR23-05
NHTSA SAFETY RECALL # 23V-126
September 2023
SR23-05
«customer»
«add» «po»
«city», «st» «zip»
USA
IMPORTANT SAFETY RECALL
This notice applies to your vehicle(s), see VIN list below.
Dear Customer,
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Prevost Car US Inc. has decided that a defect which relates to motor vehicle safety exists in certain 2018 – 2023 H3-45 Coaches, 2019 H3-41 Coaches & certain 2018 – 2023 H3-45 VIP Motorhomes.
DEFECT DESCRIPTION
Automatic Fire Suppression System (AFSS)
On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
SAFETY RISK
An unexpected loss of drive power, caused by an unwarranted Automatic Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of drive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries.
US recall notif letter
IDENTIFICATION OF ANY WARNING THAT CAN PRECEDE
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown.
REMEDY PROGRAM
Prevost has released a repair procedure to remedy the affected vehicle population and will add nylon spacers under the sensor to prevent backside corrosion causing the malfunction. Any corroded sensor will also be replaced. The service and required parts will be provided free of charge.
According to our records, you are the registered owner of the following vehicles involved in this safety recall SR23-05 :
«VIN1»
«VIN5»
«VIN9»
«VIN2»
«VIN6»
«VIN10»
«VIN3»
«VIN7»
«VIN11»
«VIN4»
«VIN8»
«VIN12»
WHAT YOU NEED TO DO
Please make an appointment to your nearest Prevost Service Center and refer to Safety Recall SR23-05 to have the vehicle serviced.
Optionally, you may have the work performed by qualified personnel of your choice, following Safety Recall SR23-05 available on Prevost Technical Publications web site at this address: http://techpub.prevostcar.com/en/
The time to inspect and repair your vehicle if required is approximately 1/2 hour (0.5h).
PART AND LABOR CLAIM
Prevost will reimburse you as described in SR23-05 procedure. Please file an online warranty claim following normal campaign procedures if you are a registered customer, otherwise, contact the Prevost Warranty Department at 1-866-870-2046 for reimbursement instructions.
NOTICE REGARDING LEASED VEHICLES
If you are a Lessor of vehicles subject to this Notice, you have an obligation under Federal Law to send a copy of this Notice to all Lessees within 10 days.
PRE-NOTIFICATION REMEDIES
If you have previously paid for repairs as a result of this issue, you may be entitled to recovery of those expenses. Prevost Car US will reimburse the claimant by check for the reasonable amount paid for repairs (i.e. the cost of parts, labor, disposal fees and taxes) that addressed the defect as stated in the safety recall notification. To qualify, repairs must
US recall notif letter
have been completed no earlier than one year prior to the release of the recall and no later than 10 days after the release of the recall mailing of the initial customer notification letter pertaining to the recall. To get reimbursed, please file an online warranty claim following normal Campaign procedures if you are a registered customer, otherwise, contact the Prevost Warranty Department at 1-866-870-2046 for reimbursement instructions.
REIMBURSEMENT OF PRE-NOTIFICATION REMEDIES
When a Prevost vehicle is affected by a safety recall and the owner/purchaser (claimant) has the safety-related defect or FMVSS regulatory noncompliance remedied at their own expense prior to receiving the manufacturer notification of the safety recall, Prevost Car (US) Inc. will reimburse the owner/purchaser for the reasonable amount paid (i.e. the cost of parts, labor, disposal fees and taxes) that addressed the safety-related defect or FMVSS regulatory noncompliance as described in the safety recall notification. To qualify, repairs must have been completed no earlier than one year prior to the release of the safety recall (notification to the government) and no later than 10 days after the last mailing of the initial customer notification letter pertaining to the recall. To get reimbursed, please file an online warranty claim following normal campaign procedure if you are a registered customer, otherwise, please contact the Prevost Warranty Department at 1-866-870-2046 for reimbursement instructions.
CHANGE OF ADDRESS OR OWNERSHIP
If your address has changed, or you no longer own the vehicle(s), please help us update our records. Use the link below to access the Prevost Warranty Support web page https://prevostcar.com/contact/warranty
Click on the link ‘Change of address or ownership’, fill the form, save it and email the file to prevost.warranty@volvo.com
ASSISTANCE
If you need assistance, please contact your nearest Prevost Service Center. You will find the Prevost Parts & Service Centers location at this address:
https://prevostcar.com/contact/parts-service-center
COMPLAINTS
You may submit a complaint if you believe that Prevost Car US has failed or is unable to remedy the defect without charge or within a reasonable time.
You may submit the complaint to the Administrator of the National Highway Traffic Safety Administration located at 1200 New Jersey Avenue SE, Washington, DC 20590, USA or call the toll-free Vehicle Safety Hotline at: 1-888-327-4236, (TTY): 1-800-424-9153) or go to http://www.safercar.gov
US recall notif letter
We regret any inconvenience this may cause to your operations but hope you will appreciate our sincere efforts to demonstrate Prevost’s commitment to provide our customers with the best possible product.
Truly yours,
Prevost Service Team

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-126
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Prevost Car (US) Inc. JUL 04, 2023 NHTSA Recall No. : 23V-126 Manufacturer Recall No. : SR23-05 Manufacturer Information :
Manufacturer Name : Prevost Car (US) Inc.
Address : 201 South Avenue
South Plains NJ 07080 Company phone : 908-222-7211
Population :
Number of potentially involved : 555 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2018-2023 Prevost H3-45 VIP Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 2 MY2018 Prevost H3-45 VIP, 40 MY2019 Prevost H3-45 VIP, 35 MY2020 Prevost H3-45 VIP, 39 MY2021 Prevost H3-45 VIP, 31 MY2022 Prevost H3-45 VIP, and 11 MY2023 Prevost H3-45 VIP. Production Dates : NOV 21, 2017 – OCT 14, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-126 Page 2 Vehicle 2 : 2018-2023 Prevost H3-45
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 3 MY2018 Prevost H3-45, 190 MY2019 Prevost H3-45, 143 MY2020 Prevost H3-45, 5 MY2021 Prevost H3-45, 13
MY2022 Prevost H3-45, and 39 MY2023 Prevost H3-45. Production Dates : NOV 01, 2017 – DEC 01, 2022
VIN Range 1 : Begin : NR End : NR Not sequential The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 3 Vehicle 3 : 2019-2019 Prevost H3-41
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 4 MY2019 Prevost H3-41. Production Dates : APR 24, 2018 – FEB 14, 2019
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : An unexpected loss of motive power, caused by an unwarranted Automatic
Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of motive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries. Prevost has not received any reports of death or injury associated with this defect. Therefore, we consider this as a proactive measure to protect the public from the potential risk associated with this defect.
Description of the Cause : On all concerned vehicles, the optical fire sensor was repositioned from the engine compartment’s upper section to its lower section as part of a design change in 2017. Being positioned in the engine compartment’s lower section, the optical fire sensor is now further exposed to water, road salt, and other contaminants. The presence of road contaminants, combined with an optical fire sensor mounting bracket that was not adequately designed by Prevost for The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 4 Identification of Any Warning
that can Occur : these operating conditions, promotes corrosion between the bracket and the sensor’s housing. Under certain conditions, corrosion could damage the sensor’s housing and allow water to ingress, ultimately causing the sensor to malfunction and to falsely detect fires.
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown. Involved Components : Component Name 1 : Fire Sensor PM-3M Component Description : Optical Fire Sensor Component Part Number : 563457 Component Name 2 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 061167 Component Name 3 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 0610076 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology :
2022-10-07 One field report related to this issue involving one vehicle was received. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 5 2022-10-21 Internal Prevost investigation was opened to identify the root cause and to determine if the issue is safety related. 2022-11-16 Case was presented on Volvo Product Safety Working Group (PSWG) to evaluate if there is a potential safety related issue. It was concluded that further investigation was required to complete the assessment. 2022-11-28 A failed sensor was sent to an external laboratory for exhaustive corrosion analysis. 2023-01-16 All field reports and warranty claims related to this issue were analyzed. Two other field reports related to this issue were reported. The first field report was received on 2019-11-28 and indicated that one MY2019 H3-45 experienced a false AFSS activation, most likely due to a corroded optical fire sensor. The report indicated that the same issue targeted five other H3-45. The second field report was received on
2022-06-24 and indicated that two MY2019 H3-45 experienced a false AFSS activation, potentially due to a Linear Thermal Detector malfunction. The investigation revealed that the false activation probably resulted from a corroded optical fire sensor. Four warranty claims related to this issue were received, all on MY2019 H3-45. The claims were received on 2020-01-27, 2020-01-30, 2020-02-05, and on 2022-04-28. Note: Two of these warranty claims were included in the field reports. 2023-01-24 Case was presented on Volvo PSWG. Decision made to raise the potential safety issue to Volvo Product Safety Committee (PSC) for review and determination. 2023-02-14 Internal campaign was launched to solve the issue on all vehicles in production before being delivered. 2023-02-23 Case was presented to Volvo PSC. It was concluded that there was a safety related defect and that a recall is needed. 2023-02-24 Safety Recall report submitted to authorities. No accidents, injuries, or fatalities related to this issue were reported. Description of Remedy :
Description of Remedy Program : Prevost will inspect all concerned vehicles, replace the optical fire sensor if
required, and install spacers between the optical fire sensor and its bracket to stop corrosion. Letters will be sent to customers to inform them on how to proceed. Prevost will execute this correction free of charge (parts and labor) for the customers. In case a customer has already inspected and corrected this defect before the safety recall has been launched, this customer will be reimbursed according to Prevost reimbursement plan. How Remedy Component Differs from Recalled Component : The remedy consists of adding spacers between the optical fire sensor and its bracket. The remedied assembly (fire sensor and its bracket) will therefore include spacers that maintains a void between the sensor’s The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126
Page 6
The information contained in this report was submitted pursuant to 49 CFR §573
housing and the bracket, thus preventing all corrosion. The recalled assembly does not include spacers that creates a void (the optical fire sensor is in contact with its bracket).
Identify How/When Recall Condition was Corrected in Production :
The recall condition was corrected in production on February 14, 2023, when an internal campaign was launched to add spacers between the fire optical sensor and its bracket on all concerned vehicles before being delivered to customers. Recall Schedule :
Description of Recall Schedule : Please note that Prevost does not have a dealer network and the dates
entered for the planned dealer notification begin/end date are only to avoid NHTSA Recall Portal error while submitting the recall report.
Planned Dealer Notification Date : SEP 04, 2023 – SEP 04, 2023
Planned Owner Notification Date : SEP 04, 2023 – SEP 04, 2023
* NR – Not Reported

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-126
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Prevost Car (US) Inc. JUL 04, 2023 NHTSA Recall No. : 23V-126 Manufacturer Recall No. : SR23-05 Manufacturer Information :
Manufacturer Name : Prevost Car (US) Inc.
Address : 201 South Avenue
South Plains NJ 07080 Company phone : 908-222-7211
Population :
Number of potentially involved : 555 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2018-2023 Prevost H3-45 VIP Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 2 MY2018 Prevost H3-45 VIP, 40 MY2019 Prevost H3-45 VIP, 35 MY2020 Prevost H3-45 VIP, 39 MY2021 Prevost H3-45 VIP, 31 MY2022 Prevost H3-45 VIP, and 11 MY2023 Prevost H3-45 VIP. Production Dates : NOV 21, 2017 – OCT 14, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-126 Page 2 Vehicle 2 : 2018-2023 Prevost H3-45
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 3 MY2018 Prevost H3-45, 190 MY2019 Prevost H3-45, 143 MY2020 Prevost H3-45, 5 MY2021 Prevost H3-45, 13
MY2022 Prevost H3-45, and 39 MY2023 Prevost H3-45. Production Dates : NOV 01, 2017 – DEC 01, 2022
VIN Range 1 : Begin : NR End : NR Not sequential The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 3 Vehicle 3 : 2019-2019 Prevost H3-41
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 4 MY2019 Prevost H3-41. Production Dates : APR 24, 2018 – FEB 14, 2019
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : An unexpected loss of motive power, caused by an unwarranted Automatic
Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of motive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries. Prevost has not received any reports of death or injury associated with this defect. Therefore, we consider this as a proactive measure to protect the public from the potential risk associated with this defect.
Description of the Cause : On all concerned vehicles, the optical fire sensor was repositioned from the engine compartment’s upper section to its lower section as part of a design change in 2017. Being positioned in the engine compartment’s lower section, the optical fire sensor is now further exposed to water, road salt, and other contaminants. The presence of road contaminants, combined with an optical fire sensor mounting bracket that was not adequately designed by Prevost for The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 4 Identification of Any Warning
that can Occur : these operating conditions, promotes corrosion between the bracket and the sensor’s housing. Under certain conditions, corrosion could damage the sensor’s housing and allow water to ingress, ultimately causing the sensor to malfunction and to falsely detect fires.
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown. Involved Components : Component Name 1 : Fire Sensor PM-3M Component Description : Optical Fire Sensor Component Part Number : 563457 Component Name 2 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 061167 Component Name 3 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 0610076 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology :
2022-10-07 One field report related to this issue involving one vehicle was received. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 5 2022-10-21 Internal Prevost investigation was opened to identify the root cause and to determine if the issue is safety related. 2022-11-16 Case was presented on Volvo Product Safety Working Group (PSWG) to evaluate if there is a potential safety related issue. It was concluded that further investigation was required to complete the assessment. 2022-11-28 A failed sensor was sent to an external laboratory for exhaustive corrosion analysis. 2023-01-16 All field reports and warranty claims related to this issue were analyzed. Two other field reports related to this issue were reported. The first field report was received on 2019-11-28 and indicated that one MY2019 H3-45 experienced a false AFSS activation, most likely due to a corroded optical fire sensor. The report indicated that the same issue targeted five other H3-45. The second field report was received on
2022-06-24 and indicated that two MY2019 H3-45 experienced a false AFSS activation, potentially due to a Linear Thermal Detector malfunction. The investigation revealed that the false activation probably resulted from a corroded optical fire sensor. Four warranty claims related to this issue were received, all on MY2019 H3-45. The claims were received on 2020-01-27, 2020-01-30, 2020-02-05, and on 2022-04-28. Note: Two of these warranty claims were included in the field reports. 2023-01-24 Case was presented on Volvo PSWG. Decision made to raise the potential safety issue to Volvo Product Safety Committee (PSC) for review and determination. 2023-02-14 Internal campaign was launched to solve the issue on all vehicles in production before being delivered. 2023-02-23 Case was presented to Volvo PSC. It was concluded that there was a safety related defect and that a recall is needed. 2023-02-24 Safety Recall report submitted to authorities. No accidents, injuries, or fatalities related to this issue were reported. Description of Remedy :
Description of Remedy Program : Prevost will inspect all concerned vehicles, replace the optical fire sensor if
required, and install spacers between the optical fire sensor and its bracket to stop corrosion. Letters will be sent to customers to inform them on how to proceed. Prevost will execute this correction free of charge (parts and labor) for the customers. In case a customer has already inspected and corrected this defect before the safety recall has been launched, this customer will be reimbursed according to Prevost reimbursement plan. How Remedy Component Differs from Recalled Component : The remedy consists of adding spacers between the optical fire sensor and its bracket. The remedied assembly (fire sensor and its bracket) will therefore include spacers that maintains a void between the sensor’s The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126
Page 6
The information contained in this report was submitted pursuant to 49 CFR §573
housing and the bracket, thus preventing all corrosion. The recalled assembly does not include spacers that creates a void (the optical fire sensor is in contact with its bracket).
Identify How/When Recall Condition was Corrected in Production :
The recall condition was corrected in production on February 14, 2023, when an internal campaign was launched to add spacers between the fire optical sensor and its bracket on all concerned vehicles before being delivered to customers. Recall Schedule :
Description of Recall Schedule : Please note that Prevost does not have a dealer network and the dates
entered for the planned dealer notification begin/end date are only to avoid NHTSA Recall Portal error while submitting the recall report.
Planned Dealer Notification Date : SEP 04, 2023 – SEP 04, 2023
Planned Owner Notification Date : SEP 04, 2023 – SEP 04, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-126
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Prevost Car (US) Inc. FEB 24, 2023 NHTSA Recall No. : 23V-126 Manufacturer Recall No. : NR Manufacturer Information :
Manufacturer Name : Prevost Car (US) Inc.
Address : 201 South Avenue
South Plains NJ 07080 Company phone : 908-222-7211
Population :
Number of potentially involved : 555 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2018-2023 Prevost H3-45
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 3 MY2018 Prevost H3-45, 194 MY2019 Prevost H3-45, 143 MY2020 Prevost H3-45, 5 MY2021 Prevost H3-45, 13
MY2022 Prevost H3-45, and 39 MY2023 Prevost H3-45. Production Dates : NOV 01, 2017 – DEC 01, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-126 Page 2 Vehicle 2 : 2018-2023 Prevost H3-45 VIP Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 2 MY2018 Prevost H3-45 VIP, 40 MY2019 Prevost H3-45 VIP, 35 MY2020 Prevost H3-45 VIP, 39 MY2021 Prevost H3-45 VIP, 31 MY2022 Prevost H3-45 VIP, and 11 MY2023 Prevost H3-45 VIP. Production Dates : NOV 21, 2017 – OCT 14, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : An unexpected loss of motive power, caused by an unwarranted Automatic
Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of motive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries. Prevost has not received any reports of death or injury associated with this defect. Therefore, we consider this as a proactive measure to protect the public from the potential risk associated with this defect.
Description of the Cause : On all concerned vehicles, the optical fire sensor was repositioned from the engine compartment’s upper section to its lower section as part of a design change in 2017. Being positioned in the engine compartment’s lower section, the optical fire sensor is now further exposed to water, road salt, and other The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 3 Identification of Any Warning
that can Occur : contaminants. The presence of road contaminants, combined with an optical fire sensor mounting bracket that was not adequately designed by Prevost for these operating conditions, promotes corrosion between the bracket and the sensor’s housing. Under certain conditions, corrosion could damage the sensor’s housing and allow water to ingress, ultimately causing the sensor to malfunction and to falsely detect fires.
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown. Involved Components : Component Name 1 : Fire Sensor PM-3M Component Description : Optical Fire Sensor Component Part Number : 563457 Component Name 2 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 061167 Component Name 3 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 0610076 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 4 2022-10-07 One field report related to this issue involving one vehicle was received. 2022-10-21 Internal Prevost investigation was opened to identify the root cause and to determine if the issue is safety related. 2022-11-16 Case was presented on Volvo Product Safety Working Group (PSWG) to evaluate if there is a potential safety related issue. It was concluded that further investigation was required to complete the assessment. 2022-11-28 A failed sensor was sent to an external laboratory for exhaustive corrosion analysis. 2023-01-16 All field reports and warranty claims related to this issue were analyzed. Two other field reports related to this issue were reported. The first field report was received on 2019-11-28 and indicated that one MY2019 H3-45 experienced a false AFSS activation, most likely due to a corroded optical fire sensor. The report indicated that the same issue targeted five other H3-45. The second field report was received on
2022-06-24 and indicated that two MY2019 H3-45 experienced a false AFSS activation, potentially due to a Linear Thermal Detector malfunction. The investigation revealed that the false activation probably resulted from a corroded optical fire sensor. Four warranty claims related to this issue were received, all on MY2019 H3-45. The claims were received on 2020-01-27, 2020-01-30, 2020-02-05, and on 2022-04-28. Note: Two of these warranty claims were included in the field reports. 2023-01-24 Case was presented on Volvo PSWG. Decision made to raise the potential safety issue to Volvo Product Safety Committee (PSC) for review and determination. 2023-02-14 Internal campaign was launched to solve the issue on all vehicles in production before being delivered. 2023-02-23 Case was presented to Volvo PSC. It was concluded that there was a safety related defect and that a recall is needed. 2023-02-24 Safety Recall report submitted to authorities. No accidents, injuries, or fatalities related to this issue were reported. Description of Remedy :
Description of Remedy Program : Prevost will inspect all concerned vehicles, replace the optical fire sensor if
required, and install spacers between the optical fire sensor and its bracket to stop corrosion. Letters will be sent to customers to inform them on how to proceed. Prevost will execute this correction free of charge (parts and labor) for the customers. In case a customer has already inspected and corrected this defect before the safety recall has been launched, this customer will be reimbursed according to Prevost reimbursement plan.
How Remedy Component Differs The remedy consists of adding spacers between the optical fire sensor and The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126
Page 5
The information contained in this report was submitted pursuant to 49 CFR §573
from Recalled Component : its bracket. The remedied assembly (fire sensor and its bracket) will therefore include spacers that maintains a void between the sensor’s housing and the bracket, thus preventing all corrosion. The recalled assembly does not include spacers that creates a void (the optical fire sensor is in contact with its bracket). Identify How/When Recall Condition was Corrected in Production : The recall condition was corrected in production on February 14, 2023, when an internal campaign was launched to add spacers between the fire optical sensor and its bracket on all concerned vehicles before being delivered to customers. Recall Schedule :
Description of Recall Schedule : Please note that Prevost does not have a dealer network and the dates
entered for the planned dealer notification begin/end date are only to avoid NHTSA Recall Portal error while submitting the recall report.
Planned Dealer Notification Date : APR 15, 2023 – APR 15, 2023
Planned Owner Notification Date : APR 15, 2023 – APR 15, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-126
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Prevost Car (US) Inc. MAR 08, 2023 NHTSA Recall No. : 23V-126 Manufacturer Recall No. : SR23-05 Manufacturer Information :
Manufacturer Name : Prevost Car (US) Inc.
Address : 201 South Avenue
South Plains NJ 07080 Company phone : 908-222-7211
Population :
Number of potentially involved : 555 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2018-2023 Prevost H3-45
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 3 MY2018 Prevost H3-45, 194 MY2019 Prevost H3-45, 143 MY2020 Prevost H3-45, 5 MY2021 Prevost H3-45, 13
MY2022 Prevost H3-45, and 39 MY2023 Prevost H3-45. Production Dates : NOV 01, 2017 – DEC 01, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-126 Page 2 Vehicle 2 : 2018-2023 Prevost H3-45 VIP Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 2 MY2018 Prevost H3-45 VIP, 40 MY2019 Prevost H3-45 VIP, 35 MY2020 Prevost H3-45 VIP, 39 MY2021 Prevost H3-45 VIP, 31 MY2022 Prevost H3-45 VIP, and 11 MY2023 Prevost H3-45 VIP. Production Dates : NOV 21, 2017 – OCT 14, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : An unexpected loss of motive power, caused by an unwarranted Automatic
Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of motive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries. Prevost has not received any reports of death or injury associated with this defect. Therefore, we consider this as a proactive measure to protect the public from the potential risk associated with this defect.
Description of the Cause : On all concerned vehicles, the optical fire sensor was repositioned from the engine compartment’s upper section to its lower section as part of a design change in 2017. Being positioned in the engine compartment’s lower section, the optical fire sensor is now further exposed to water, road salt, and other The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 3 Identification of Any Warning
that can Occur : contaminants. The presence of road contaminants, combined with an optical fire sensor mounting bracket that was not adequately designed by Prevost for these operating conditions, promotes corrosion between the bracket and the sensor’s housing. Under certain conditions, corrosion could damage the sensor’s housing and allow water to ingress, ultimately causing the sensor to malfunction and to falsely detect fires.
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown. Involved Components : Component Name 1 : Fire Sensor PM-3M Component Description : Optical Fire Sensor Component Part Number : 563457 Component Name 2 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 061167 Component Name 3 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 0610076 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 4 2022-10-07 One field report related to this issue involving one vehicle was received. 2022-10-21 Internal Prevost investigation was opened to identify the root cause and to determine if the issue is safety related. 2022-11-16 Case was presented on Volvo Product Safety Working Group (PSWG) to evaluate if there is a potential safety related issue. It was concluded that further investigation was required to complete the assessment. 2022-11-28 A failed sensor was sent to an external laboratory for exhaustive corrosion analysis. 2023-01-16 All field reports and warranty claims related to this issue were analyzed. Two other field reports related to this issue were reported. The first field report was received on 2019-11-28 and indicated that one MY2019 H3-45 experienced a false AFSS activation, most likely due to a corroded optical fire sensor. The report indicated that the same issue targeted five other H3-45. The second field report was received on
2022-06-24 and indicated that two MY2019 H3-45 experienced a false AFSS activation, potentially due to a Linear Thermal Detector malfunction. The investigation revealed that the false activation probably resulted from a corroded optical fire sensor. Four warranty claims related to this issue were received, all on MY2019 H3-45. The claims were received on 2020-01-27, 2020-01-30, 2020-02-05, and on 2022-04-28. Note: Two of these warranty claims were included in the field reports. 2023-01-24 Case was presented on Volvo PSWG. Decision made to raise the potential safety issue to Volvo Product Safety Committee (PSC) for review and determination. 2023-02-14 Internal campaign was launched to solve the issue on all vehicles in production before being delivered. 2023-02-23 Case was presented to Volvo PSC. It was concluded that there was a safety related defect and that a recall is needed. 2023-02-24 Safety Recall report submitted to authorities. No accidents, injuries, or fatalities related to this issue were reported. Description of Remedy :
Description of Remedy Program : Prevost will inspect all concerned vehicles, replace the optical fire sensor if
required, and install spacers between the optical fire sensor and its bracket to stop corrosion. Letters will be sent to customers to inform them on how to proceed. Prevost will execute this correction free of charge (parts and labor) for the customers. In case a customer has already inspected and corrected this defect before the safety recall has been launched, this customer will be reimbursed according to Prevost reimbursement plan.
How Remedy Component Differs The remedy consists of adding spacers between the optical fire sensor and The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126
Page 5
The information contained in this report was submitted pursuant to 49 CFR §573
from Recalled Component : its bracket. The remedied assembly (fire sensor and its bracket) will therefore include spacers that maintains a void between the sensor’s housing and the bracket, thus preventing all corrosion. The recalled assembly does not include spacers that creates a void (the optical fire sensor is in contact with its bracket). Identify How/When Recall Condition was Corrected in Production : The recall condition was corrected in production on February 14, 2023, when an internal campaign was launched to add spacers between the fire optical sensor and its bracket on all concerned vehicles before being delivered to customers. Recall Schedule :
Description of Recall Schedule : Please note that Prevost does not have a dealer network and the dates
entered for the planned dealer notification begin/end date are only to avoid NHTSA Recall Portal error while submitting the recall report.
Planned Dealer Notification Date : APR 15, 2023 – APR 15, 2023
Planned Owner Notification Date : APR 15, 2023 – APR 15, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-126
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Prevost Car (US) Inc. MAR 14, 2023 NHTSA Recall No. : 23V-126 Manufacturer Recall No. : SR23-05 Manufacturer Information :
Manufacturer Name : Prevost Car (US) Inc.
Address : 201 South Avenue
South Plains NJ 07080 Company phone : 908-222-7211
Population :
Number of potentially involved : 555 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2018-2023 Prevost H3-45 VIP Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 2 MY2018 Prevost H3-45 VIP, 40 MY2019 Prevost H3-45 VIP, 35 MY2020 Prevost H3-45 VIP, 39 MY2021 Prevost H3-45 VIP, 31 MY2022 Prevost H3-45 VIP, and 11 MY2023 Prevost H3-45 VIP. Production Dates : NOV 21, 2017 – OCT 14, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-126 Page 2 Vehicle 2 : 2018-2023 Prevost H3-45
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 3 MY2018 Prevost H3-45, 190 MY2019 Prevost H3-45, 143 MY2020 Prevost H3-45, 5 MY2021 Prevost H3-45, 13
MY2022 Prevost H3-45, and 39 MY2023 Prevost H3-45. Production Dates : NOV 01, 2017 – DEC 01, 2022
VIN Range 1 : Begin : NR End : NR Not sequential The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 3 Vehicle 3 : 2019-2019 Prevost H3-41
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The population was determined by identifying all vehicles equipped with an Automatic Fire Suppression System (AFSS) optical fire sensor positioned in the engine compartment’s lower region. The recalled products are limited to these specific vehicles since they are the only ones with the problematic optical fire sensor configuration. It is to be noted that not all vehicles produced during the indicated production dates are concerned by this issue given that the Automatic Fire Suppression System is offered as an option for clients. Other vehicles not included in this recall were also equipped with an AFSS optical fire sensor. However, the sensor in these vehicles is positioned in the engine compartment’s upper region (different sensor configuration), which does not generate the issue addressed by this recall, thus justifying why these vehicles were not included in the recalled population. The following vehicles are affected by the recall: 4 MY2019 Prevost H3-41. Production Dates : APR 24, 2018 – FEB 14, 2019
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, the optical fire sensor could malfunction and wrongfully detect a fire. In this event, the Automatic Fire Suppression System (AFSS) may give false warning to the driver, command an unwarranted engine shutdown, and release chemical fire extinguishing agent in the engine compartment.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : An unexpected loss of motive power, caused by an unwarranted Automatic
Fire Suppression System activation, can increase the risk of a crash without prior warning. A loss of motive power may also require a passenger evacuation in traffic and other potential hazards, which increases the risk of injuries. Prevost has not received any reports of death or injury associated with this defect. Therefore, we consider this as a proactive measure to protect the public from the potential risk associated with this defect.
Description of the Cause : On all concerned vehicles, the optical fire sensor was repositioned from the engine compartment’s upper section to its lower section as part of a design change in 2017. Being positioned in the engine compartment’s lower section, the optical fire sensor is now further exposed to water, road salt, and other contaminants. The presence of road contaminants, combined with an optical fire sensor mounting bracket that was not adequately designed by Prevost for The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 4 Identification of Any Warning
that can Occur : these operating conditions, promotes corrosion between the bracket and the sensor’s housing. Under certain conditions, corrosion could damage the sensor’s housing and allow water to ingress, ultimately causing the sensor to malfunction and to falsely detect fires.
In some cases, the Automatic Fire Suppression System trouble light may be intermittently illuminated prior to the event. The driver will also receive a visible and audible alert prior to the engine shutdown. Involved Components : Component Name 1 : Fire Sensor PM-3M Component Description : Optical Fire Sensor Component Part Number : 563457 Component Name 2 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 061167 Component Name 3 : AFSS Optical Sensor Bracket Component Description : AFSS Optical Sensor Bracket Component Part Number : 0610076 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology :
2022-10-07 One field report related to this issue involving one vehicle was received. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126 Page 5 2022-10-21 Internal Prevost investigation was opened to identify the root cause and to determine if the issue is safety related. 2022-11-16 Case was presented on Volvo Product Safety Working Group (PSWG) to evaluate if there is a potential safety related issue. It was concluded that further investigation was required to complete the assessment. 2022-11-28 A failed sensor was sent to an external laboratory for exhaustive corrosion analysis. 2023-01-16 All field reports and warranty claims related to this issue were analyzed. Two other field reports related to this issue were reported. The first field report was received on 2019-11-28 and indicated that one MY2019 H3-45 experienced a false AFSS activation, most likely due to a corroded optical fire sensor. The report indicated that the same issue targeted five other H3-45. The second field report was received on
2022-06-24 and indicated that two MY2019 H3-45 experienced a false AFSS activation, potentially due to a Linear Thermal Detector malfunction. The investigation revealed that the false activation probably resulted from a corroded optical fire sensor. Four warranty claims related to this issue were received, all on MY2019 H3-45. The claims were received on 2020-01-27, 2020-01-30, 2020-02-05, and on 2022-04-28. Note: Two of these warranty claims were included in the field reports. 2023-01-24 Case was presented on Volvo PSWG. Decision made to raise the potential safety issue to Volvo Product Safety Committee (PSC) for review and determination. 2023-02-14 Internal campaign was launched to solve the issue on all vehicles in production before being delivered. 2023-02-23 Case was presented to Volvo PSC. It was concluded that there was a safety related defect and that a recall is needed. 2023-02-24 Safety Recall report submitted to authorities. No accidents, injuries, or fatalities related to this issue were reported. Description of Remedy :
Description of Remedy Program : Prevost will inspect all concerned vehicles, replace the optical fire sensor if
required, and install spacers between the optical fire sensor and its bracket to stop corrosion. Letters will be sent to customers to inform them on how to proceed. Prevost will execute this correction free of charge (parts and labor) for the customers. In case a customer has already inspected and corrected this defect before the safety recall has been launched, this customer will be reimbursed according to Prevost reimbursement plan. How Remedy Component Differs from Recalled Component : The remedy consists of adding spacers between the optical fire sensor and its bracket. The remedied assembly (fire sensor and its bracket) will therefore include spacers that maintains a void between the sensor’s The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-126
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The information contained in this report was submitted pursuant to 49 CFR §573
housing and the bracket, thus preventing all corrosion. The recalled assembly does not include spacers that creates a void (the optical fire sensor is in contact with its bracket).
Identify How/When Recall Condition was Corrected in Production :
The recall condition was corrected in production on February 14, 2023, when an internal campaign was launched to add spacers between the fire optical sensor and its bracket on all concerned vehicles before being delivered to customers. Recall Schedule :
Description of Recall Schedule : Please note that Prevost does not have a dealer network and the dates
entered for the planned dealer notification begin/end date are only to avoid NHTSA Recall Portal error while submitting the recall report.
Planned Dealer Notification Date : APR 15, 2023 – APR 15, 2023
Planned Owner Notification Date : APR 15, 2023 – APR 15, 2023
* NR – Not Reported

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