SC0460 – Park Brake Pressure Switch – 2024 Mack MD6 & MD7

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MACK TRUCKS
SAFETY RECALL ALERT
© Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without
notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document.
Description
On certain vehicles when the park brake is applied, the light indicates it is not applied. When the park brake is not
applied, the light indicates it is applied. If the park brake indicator is incorrect it increases the risk of an accident.
Vehicles will be recalled and the remedy program will be to inspect functionality of the park brake and replace
with the correct park brake switch if necessary.
Model and Model Years Affected
 Certain 2024 Mack MD6 and MD7 vehicles manufactured November 09, 2023 through November 29,
2023.
Vehicle Quantities
 117 vehicles (117 US)
Dealer Responsibilities
 The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act require
dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant
safety standards at the time of delivery to the consumer.
 Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle
included in the safety recall in their inventory to be sold, the condition must be corrected before
releasing it to a customer.
Notification Release Schedule
• Vehicle list will be posted on the Trucks Dealer Portal March 05, 2024.
• Owner notification letters will be released on or before April 26, 2024.
Contact
If you have questions or concerns about this recall, contact the Regulatory Affairs Department at
vtna.regulatoryaffairs@volvo.com.
Subject: Safety Recall SC0460 Park Brake Pressure Switch
Recall Number: SRA-M460
Date: March 5, 2024
Applicable Markets: ☒U.S. ☐Canada ☐ Export

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Dealer Id MD Chassis Number VIN
A297 MD6 14500 1M2MDBAA3RS014500
A297 Count 1
A371 MD7 74932 1M2MDBAB1RS074932
A371 MD7 74933 1M2MDBAB3RS074933
A371 Count 2
A388 MD7 74990 1M2MDBAB4RS074990
A388 Count 1
A438 MD7 74903 1M2MDBAA6RS074903
A438 Count 1
A458 MD7 74880 1M2MDBAA9RS074880
A458 MD7 75726 1M2MDBAB3RS075726
A458 Count 2
A546 MD6 14474 1M2MDBAA6RS014474
A546 Count 1
A687 MD6 14333 1M2MDAAA7RS014333
A687 Count 1
C117 MD6 14223 1M2MDAAA0RS014223
C117 MD7 74830 1M2MDBAB4RS074830
C117 Count 2
C614 MD6 14042 1M2MDBAAXRS014042
C614 MD6 14044 1M2MDBAA3RS014044
C614 MD6 14208 1M2MDBAA7RS014208
C614 MD6 14209 1M2MDBAA9RS014209
C614 MD6 14211 1M2MDBAA7RS014211
C614 MD6 14212 1M2MDBAA9RS014212
C614 MD6 14218 1M2MDBAAXRS014218
C614 MD7 74732 1M2MDBAA5RS074732
C614 Count 8
C630 MD6 14055 1M2MDBAA8RS014055
C630 Count 1
C641 MD6 14215 1M2MDBAA4RS014215
C641 Count 1
C654 MD7 74897 1M2MDBAB3RS074897
C654 MD7 75063 1M2MDBAB3RS075063
C654 MD7 75064 1M2MDBAA6RS075064
C654 Count 3
C663 MD7 74934 1M2MDBAB5RS074934
C663 Count 1
C671 MD6 14043 1M2MDBAA1RS014043
C671 Count 1
C695 MD6 14045 1M2MDBAA5RS014045
C695 MD6 14050 1M2MDAAA6RS014050
C695 MD6 14051 1M2MDBAA0RS014051
C695 MD7 74862 1M2MDBAA7RS074862
C695 Count 4
C697 MD7 74891 1M2MDBAB2RS074891
C697 Count 1
C699 MD7 75009 1M2MDBAA9RS075009
C699 Count 1
D370 MD6 14103 1M2MDBAA4RS014103
D370 MD7 74910 1M2MDBAA3RS074910
D370 Count 2
D490 MD6 14838 1M2MDBAA7RS014838
D490 Count 1
D520 MD6 14280 1M2MDBAA4RS014280
D520 Count 1
D549 MD6 15055 1M2MDBAA2RS015055
D549 MD7 74901 1M2MDBAA2RS074901
D549 MD7 74902 1M2MDBAA4RS074902
D549 Count 3
D806 MD7 74894 1M2MDBAB8RS074894
D806 Count 1
D808 MD6 14201 1M2MDBAA4RS014201
D808 MD6 14203 1M2MDBAA8RS014203
D808 MD6 14204 1M2MDBAAXRS014204
D808 Count 3
D862 MD7 75085 1M2MDBAB2RS075085
D862 MD7 75086 1M2MDBAB4RS075086
D862 MD7 75087 1M2MDBAB6RS075087
D862 Count 3
D879 MD7 74834 1M2MDBAA2RS074834
D879 MD7 75747 1M2MDBAA1RS075747
D879 Count 2
F213 MD7 74844 1M2MDBAB4RS074844
F213 MD7 74845 1M2MDBAB6RS074845
F213 Count 2
F220 MD7 74882 1M2MDBAA2RS074882
F220 MD7 74883 1M2MDBAA4RS074883
F220 Count 2
F235 MD7 74907 1M2MDBAB2RS074907
F235 MD7 74908 1M2MDBAB4RS074908
F235 Count 2
F240 MD7 74826 1M2MDBAB2RS074826
F240 Count 1
F243 MD6 14284 1M2MDBAA1RS014284
F243 Count 1
F259 MD7 74885 1M2MDBAB7RS074885
F259 Count 1
F272 MD6 13907 1M2MDBAA6RS013907
F272 Count 1
F285 MD7 74936 1M2MDBAB9RS074936
F285 MD7 74939 1M2MDBAB4RS074939
F285 MD7 74940 1M2MDBAB0RS074940
F285 MD7 74944 1M2MDBAB8RS074944
F285 MD7 74945 1M2MDBABXRS074945
F285 Count 5
F286 MD6 14089 1M2MDBAA3RS014089
F286 Count 1
F299 MD6 14163 1M2MDBAA0RS014163
F299 Count 1
F389 MD6 14067 1M2MDBAA4RS014067
F389 Count 1
F692 MD6 14060 1M2MDBAA1RS014060
F692 MD6 14061 1M2MDBAA3RS014061
F692 MD6 14063 1M2MDBAA7RS014063
F692 MD6 14096 1M2MDBAA0RS014096
F692 MD6 14097 1M2MDBAA2RS014097
F692 MD6 14100 1M2MDAAA6RS014100
F692 MD7 74925 1M2MDBAB4RS074925
F692 Count 7
F706 MD7 74905 1M2MDBAAXRS074905
F706 MD7 74906 1M2MDBAA1RS074906
F706 Count 2
P715 MD6 14176 1M2MDBAA9RS014176
P715 Count 1
P731 MD6 14169 1M2MDBAA1RS014169
P731 MD6 14171 1M2MDBAAXRS014171
P731 MD6 14172 1M2MDBAA1RS014172
P731 MD7 75835 1M2MDBAA9RS075835
P731 Count 4
P732 MD6 14108 1M2MDBAA3RS014108
P732 MD6 14114 1M2MDBAA9RS014114
P732 MD6 14115 1M2MDBAA0RS014115
P732 MD6 14118 1M2MDBAA6RS014118
P732 MD6 14126 1M2MDBAA5RS014126
P732 MD6 14133 1M2MDBAA2RS014133
P732 MD6 14136 1M2MDBAA8RS014136
P732 MD6 14137 1M2MDBAAXRS014137
P732 MD6 14141 1M2MDBAA1RS014141
P732 MD6 14143 1M2MDBAA5RS014143
P732 MD6 14147 1M2MDBAA2RS014147
P732 MD6 14148 1M2MDBAA4RS014148
P732 MD6 14150 1M2MDBAA2RS014150
P732 MD6 14151 1M2MDBAA4RS014151
P732 MD6 14152 1M2MDBAA6RS014152
P732 MD6 14153 1M2MDBAA8RS014153
P732 MD6 14154 1M2MDBAAXRS014154
P732 MD6 14155 1M2MDBAA1RS014155
P732 MD6 14158 1M2MDBAA7RS014158
P732 MD6 14159 1M2MDBAA9RS014159
P732 MD6 14160 1M2MDBAA5RS014160
P732 MD6 14161 1M2MDBAA7RS014161
P732 MD6 14162 1M2MDBAA9RS014162
P732 MD6 14241 1M2MDBAA5RS014241
P732 MD6 14242 1M2MDBAA7RS014242
P732 MD6 14244 1M2MDBAA0RS014244
P732 MD6 14247 1M2MDBAA6RS014247
P732 MD7 75742 1M2MDBAB1RS075742
P732 Count 28
P741 MD6 14189 1M2MDBAA7RS014189
P741 MD6 14191 1M2MDBAA5RS014191
P741 MD6 14195 1M2MDBAA2RS014195
P741 MD6 14198 1M2MDBAA8RS014198
P741 Count 4
P761 MD6 14167 1M2MDBAA8RS014167
P761 MD7 74889 1M2MDBAB4RS074889
P761 Count 2
A704 MD6 13918 1M2MDBAA0RS013918
A704 MD6 14005 1M2MDBAA4RS014005
A704 Count 2
A427 MD6 14104 1M2MDBAA6RS014104
A427 Count 1

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 24V-167
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Mack Trucks, Inc. MAR 01, 2024 NHTSA Recall No. : 24V-167 Manufacturer Recall No. : SC0460
Manufacturer Information :
Manufacturer Name : Mack Trucks, Inc.
Address : 2100 Mack Boulevard
PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131
Population :
Number of potentially involved : 117 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2024-2024 Mack MD6 and MD7.
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : The recall population is vehicles built with improper brake pressure switch(s) which indicates the incorrect park brake status. When the park brake is applied, the light indicates it is not applied. When the park brake is not applied, the light indicates it is applied. The number of affected products is 117 Mack/MD6 & MD7/MY 2024
Production Dates : NOV 09, 2023 – NOV 29, 2023 VIN Range 1 : Begin : 1M2MDBAA8RS014055 End : 1M2MDBAA7RS014838 ✔ Not sequential Description of Defect :
Description of the Defect : When the park brake is applied, the light indicates it is not applied. When the park brake is not applied, the light indicates it is applied.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : If the park brake indicator is incorrect it increases the risk of an accident.
Description of the Cause : Supplier shipped wrong part to our manufacturing facility Identification of Any Warning
that can Occur : Park brake dash control valve and actual brake status are in conflict with the park brake applied or not applied light. Cruise control will not set. Daytime running lights shutoff when the park brake is released.
Involved Components : Part 573 Safety Recall Report 24V-167 Page 2 Component Name 1 : Switch
Component Description : Pressure Park Brake Component Part Number : 20489116 Supplier Identification : Component Manufacturer
Name : Kendrion (Shelby) Inc.
Address : 1100 Airport Road
Shelby North Carolina 28150-3699 Country : United States Chronology :
December 11, 2023 Mack Manufacturing informs Product Safety that they have trucks which were built with a incorrect park brake switch due to a supplier error, an investigation is opened. Engineering evaluation is started to identify impact on vehicle functions. February 19, 2024 Investigation findings are reviewed with Product Safety Evaluation Committee and recommendation that this be brought to Product Safety Committee as a potential product safety defect. February 26, 2024 Product Safety Committee meets and reviews evaluation and determines that a product safety defect exists and a recall will be performed. March 1, 2024 DIR 573 Report filed with NHTSA There have been no accidents or injuries related to this issue, there have been no warranty claims, field reports or customer complaints associated with this issue. Description of Remedy :
Description of Remedy Program : Vehicles will be recalled and remedy program will be inspect for the
incorrect brake pressure switch and function and replace it with the correct brake pressure switch. Reimbursement for the recall will be covered by Manufacturer’s Reimbursement Plan on file with NHTSA. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 24V-167
Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
How Remedy Component Differs from Recalled Component :
Identify How/When Recall Condition was Corrected in Production :
The remedy component is the correct brake pressure switch. Switch, Pressure Park Brake , 20489116
Vehicles at our assembly facility were quarantined November 30, 2023 and corrected prior to any shipment. Recall Schedule :
Description of Recall Schedule : Dealer notification will begin on March 8, 2024 and owner notification will begin on or before April 26, 2024
Planned Dealer Notification Date : MAR 08, 2024 – MAR 08, 2024
Planned Owner Notification Date : APR 26, 2024 – APR 26, 2024
* NR – Not Reported

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Date Number Release Page 03.2024 SC0460 01 1(16)
Mack MMD Brake Pressure Switch
MD6, MD7
RECALL INFORMATION
(March 2024)
Mack Trucks has determined that certain 2024 model year MD6 and MD7 vehicles were built with an improper brake pressure switch which indicates the incorrect park brake status. When the park brake is applied, the light indicates it is not applied. When the park brake is not applied, the light indicates it is applied.
Mack Trucks has not received warranty claims, field reports, or service reports due to this issue.
To ensure that these vehicles meet Mack’s stringent quality requirements, follow the instructions outlined below to inspect functionality of the park brake and replace with the correct park brake switch if necessary.
VEHICLES AFFECTED
Certain Mack MD6 and MD7 model vehicles manufactured between November 9, 2023, and November 29, 2023.
VEHICLE QUANTITY
There are 117 vehicles affected by this recall. (117 US)
SAFETY
RECALL
Mack Trucks Inc.
Greensboro, NC USA
Parts
Part Number Part Description Quantity
20489116
Switch
As needed
*The incorrect part has a yellow stripe on it. *The correct part has no yellow stripe on it.
Repair Instructions
NOTE: Check for park brake switch functionality before proceeding with replacement. An incorrect park brake switch will present the following:
• Cruise control cannot be set.
• Daytime running lights will shut off when park brake is released.
• When the park brake is applied, the light in the dash will indicate that it is not applied.
• When the park brake is not applied, the light in the dash will indicate that it is applied.
If switch does not operate as it should, continue with park brake switch replacement.
Please refer to Impact procedure 3646-03-02-59 Pressure Switch, Park brake, Replacement
1. Park the vehicle on level surface.
2. Apply the parking brake.
3. Place the gear level in neutral.
4. Install the wheel chocks.
Safety Recall Date 03.2024 Page 3 of 16
5. Disconnect the cable from the negative terminal.
6. Drain the compressed air tanks.
Safety Recall Date 03.2024 Page 4 of 16
7. Remove the screws.
8. Remove the panel.
9. Remove the screws.
Safety Recall Date 03.2024 Page 5 of 16
10. Remove the front panel cover.
11. Remove the screws.
Safety Recall Date 03.2024 Page 6 of 16
12. Remove the panel.
13. Remove the screws.
Safety Recall Date 03.2024 Page 7 of 16
14. Remove the panel.
15. Remove the screws.
Safety Recall Date 03.2024 Page 8 of 16
16. Remove the panel.
17. Disconnect the connector.
Safety Recall Date 03.2024 Page 9 of 16
18. Remove the switch. Required material DISASSEMBLY TOOL 88870015
19. Install the switch.
20. Connect the connector.
Safety Recall Date 03.2024 Page 10 of 16
21. Connect the cable to the negative terminal.
22. Start the engine.
23. Idle engine until the pneumatic system is at operational pressure.
24. Check the air line for leakage.
25. Install the panel.
26. Install the screws.
Safety Recall Date 03.2024 Page 11 of 16
27. Torque tighten the screws. Tightening torque
Screw
M5
6 ±1.0 Nm
(4 ±1 lbf⋅ft)
28. Install the panel.
29. Install the screws.
Safety Recall Date 03.2024 Page 12 of 16
30. Torque tighten the screws. Tightening torque
Screw
M5
6 ±1.0 Nm
(4 ±1 lbf⋅ft)
31. Install the panel.
32. Install the screws.
Safety Recall Date 03.2024 Page 13 of 16
33. Torque tighten the screws. Tightening torque
Screw
M5
6 ±1.0 Nm
(4 ±1 lbf⋅ft)
34. Install the front panel cover.
35. Install the screws.
36. Torque tighten the screws. Tightening torque
Screw
M5
6 ±1.0 Nm
(4 ±1 lbf⋅ft)
Safety Recall Date 03.2024 Page 14 of 16
37. Install the panel.
38. Install the screws.
39. Torque tighten the screws. Tightening torque
Screw
M5
6 ±1.0 Nm
(4 ±1 lbf⋅ft)
Safety Recall Date 03.2024 Page 15 of 16
40. Remove the wheel chocks.
Safety Recall Date 03.2024 Page 16 of 16
REIMBURSEMENT
This repair is covered by an authorized Safety Recall. Reimbursement is obtained through the normal claim handling process.
UCHP Reimbursement Claim Type (used only when uploading from the Dealer Business System)
40
Recall Status
Vehicle repaired per instructions
1-Modified per instructions Labor Codes
3646-03-02-59 Pressure Switch, Park Brake, Replacement
0.8 hrs.
1720-16-09-01 Campaign, General X 3 (Inspection Only)
(0.1 x 3)
0.3 hrs. Causal Part
20489116 Authorization Number
C0356
Note: Dealers or the designated representatives are to perform Safety Recall on all subject vehicles at no charge to the vehicle owner regardless of mileage, age of vehicle or ownership (original purchaser or subsequent purchasers). Whenever vehicles that are subject to a Safety Recall are brought to your dealership for service, it is strongly recommended that every effort be made to perform the recall correction before the vehicle is released to the owner.

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This Notice applies to your vehicle, see enclosed “Notice of Vehicle Recall”
DEAR MACK TRUCK OWNER:
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Mack Trucks, Inc. has decided that a defect which relates to motor vehicle safety exists in c ertain
2024 Mack MD6 and MD7 vehicles manufactured November 09, 2023 through November 29, 2023.
SAFETY DEFECT: On certain vehicles when the park brake is applied, the light indicates it is not
applied. When the park brake is not applied, the light indicates it is applied.
SAFETY RISK:
If the park brake indicator is incorrect it increases the risk of a crash.
There are no precautions you can take other than having your vehicle repaired by
a Mack service center. Vehicles will be recalled and inspected for functionality of
the park brake and replaced with the correct park brake switch if necessary. Recall
repairs will be performed at no cost to you.
The time required to repair your vehicle is approximately 1 hour.
You should contact the nearest Mack Parts and Service Center and make an
appointment. You can locate the closest Mack Parts and Service Center by going
online to http://www.macktrucks.com/ and selecting “Dealer & Service
Locations” or by calling our toll-free number: 1-800-866-1177.
PRECAUTIONS YOU
CAN TAKE:
TIME REQUIRED
FOR THE REPAIR:
WHAT YOU SHOULD
DO:
SC0460_OWNER_LTR
March 2024
IMPORTANT SAFETY RECALL SC0460
NHTSA RECALL # 24V167
NOTICE REGARDING
LEASED VEHICLES:
If you are a Lessor of vehicles subject to this Notice, you have an obligation under
Federal Law to provide a copy of this Notice to all Lessees within 10 days of your
receipt of this Notice. Further, you must maintain a record, which identifies the
Lessee(s) to whom you send a copy of this letter, the date you send this letter, and
the Vehicle Identification Number(s) of the vehicle(s) that you have leased to that
lessee. For purposes of this Notice, the term Lessor means: a person or entity that
is the owner, as reflected on the vehicle’s title, of any five or more leased vehicles
(as defined in CFR Section 577.4), as of the date of notification by the
manufacturer of the existence of a safety- related defect or non-compliance with
a Federal Motor Vehicle Safety Standard in one or more of the leased motor
vehicles.
OWNER RECALL
RESPONSE CARD:
The enclosed “Notice of Vehicle Recall” identifies your vehicle. If you no
longer own the vehicle, please help us update our records by completing the
“Vehicle Disposition Record” portion of the enclosed postage-free Notice of
Mandatory Safety Campaign card and mailing it back to us.
ASSISTANCE/
COMPLAINTS:
PRE NOTIFICATION
REMEDIES:
If your vehicle has not been repaired within a reasonable time after delivering
it to a Mack Parts and Service Center, please contact:
Mack Trucks, Inc.
North American Certification and Compliance
P.O. Box 26115
Greensboro, NC 27402-6115
vtna.regulatoryaffairs@volvo.com
You may also submit complaints to the Administrator of the National
Highway Traffic Safety Administration (1200 New Jersey Avenue, S.E.,
Washington DC 20590 or call the toll-free Auto Safety Hot Line at 1-888-
327-4236 (TTY: 1-800-424-9153), or go to http://www.safercar.gov if you
believe that Mack has failed to remedy the defect without charge, or has
failed to remedy the vehicle within 60 days of the owners first tender to
obtain repair following the earliest time that parts are available.
If you have previously paid for repairs as a result of this issue, you may be
entitled to recovery of those expenses.
Submit copies of all documentation supporting your claim according to
the rules specified in the “General Plan for Reimbursement of Prenotification
Remedies” provided in this mailing.
We regret any inconvenience this may cause to your operation, but hope you will appreciate our sincere
efforts to demonstrate Mack’s commitment to provide our customers with the best possible product.
MACK TRUCKS, INC.

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