22518 – Connecting Rod May Crack and Cause Engine Failure – 2018-2021 International HV, 2018-2020 International HX, 2018-2019 International LT & International RH

SEOCONTENT-START

Received Date Vehicle Build Date Model Inspection Results Jan 2021 Aug 2018 HX CYL3 SE chunked & spun/Bearing spun and damaged/Rod fractured. Mar 2021 Mar 2019 HX CYL 5 SE Chunked / Bearing spun Apr 2021 Aug 2018 HV CYL 4 SE chunked Aug 2021 Dec 2018 HV CYL 2 SE chunked/ Bearing spun. CYL 4,6 SE cracked Aug 2021 Feb 2019 HV CYL 2 SE chunked/ Liner scored. CYL 6 SE chunked Sep 2021 May 2018 HV SE chunk missing cyl 6 Sep 2021 Aug 2018 HV CYL 3 SE Chunked/ Bearing spun/ Rod fractured Dec 2021 Apr 2019 HV CYL 5 SE chunked./ Bearing spun Apr 2022 Jun 2019 HV CYL 1 SE Chunked, CYL 3,4 SE Cracked Apr 2022 Oct 2019 HV CYL 4 Ventilated. CYL 2 SE bushing cracked/ Bearing polished Aug 2022 Dec 2018 HV CYL 2 SE Chunked, CYL 3,6 SE Cracked Sep 2019 Oct 2017 RH CYL 6 SE chunked/Bearing scored to copper/Rod fractured Oct 2019 Aug 2017 RH CYL 4 SE Chunked/Bearing spun to copper/Rod fractured Mar 2020 Mar 2018 RH Cyl 4 SE Chunked / Bearing spun Apr 2020 Jun 2017 LT SE chunk missing cyl 6 Apr 2020 Aug 2017 LT SE chunk missing cyl 5 May 2020 Feb 2018 RH SE stripping on Cyl 1, 5 May 2020 Aug 2017 RH CYL5 SE chunked/ Bearing spun Jun 2020 Feb 2018 LT SE chunk missing cyl 2 Dec 2020 Oct 2017 RH CYL4 SE chunked/ Bearing spun/Rod fractured Feb 2021 Jan 2018 LT Cyl 4 SE Chunked / Bearing spun Feb 2021 Nov 2017 LT CYL 5 SE chunked/ Bearing spun/ Rod fractured. Mar 2021 Jan 2018 LT CYL 2 SE chunked Mar 2021 Jan 2018 LT CYL 5 SE Chunked / Bearing spun / Rod fractured Mar 2021 Feb 2018 LT CYL 6 SE Chunked, Rod Fractured Mar 2021 Jan 2018 RH CYL 6 SE Chunked / Rod fractured Mar 2021 Nov 2017 RH CYL3 SE chunked/ bearing damaged to copper/Rod fractured Apr 2021 Jan 2018 LT CYL 4 SE Chunked, CYL 1 & 3 SE Cracked Apr 2021 Sep 2017 LT CYL 2, 5 SE Chunked, CYL 1, 3, 6 SE Cracked Apr 2021 Nov 2017 LT CYL 3 SE chunked Apr 2021 May 2018 RH SE chunked cyl #3 / SE cracks cyl #4 & 6 May 2021 Jan 2018 LT CYL 2 & 6 SE Chunked, CYL 3 SE Cracked Jun 2021 Feb 2018 LT CYL 1 SE chunked Dec 2021 Jun 2017 LT CYL 4,5,6 SE Chunked, CYL 4,5,6 Bearing side loading Apr 2022 Feb 2018 LT CYL 3 SE chunked Jul 2022 Sep 2017 LT CYL 1,2,4,5 SE Cracked, CYL 6 SE Chunked Aug 2022 Nov 2017 LT CYL 3 SE chunked Aug 2022 Jul 2017 LT CYL 2 SE chunked Aug 2022 Aug 2017 LT CYL 4,6 SE Chunked Connecting Rod Failures Outside of Original 21V-281 Population

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–~~RWCEPROCEDURE ©00 □@□ NOV 14 2022 Compliance Dept SUBJECT: SAFETY RECALL 22518 November, 2022 Connecting Rod Knock Detection Calibration on certain 2018 thru 2021 International® HV1 ., Series trucks built 06/22/2017 thru 02/05/2020, 2018 thru 2020 International® HX® Series trucks built 11/07/2017 thru 12/10/2019, and 2018 and 2019 International® LT® and RH™ Series trucks built 03/15/2017 thru 08/06/2018 with International® A26 engines CUSTOMER LETTER Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION The connecting rod bushing over time may develop cracks or lose chunks of material, which could lead to connecting rod failure. Connecting rod failure in some cases can result in engine shutdown with minimal warning; a stalled vehicle in or near the roadway can increase the risk of a vehicle crash. MODELS INVOLVED This safety recall involves certain 2018 thru 2021 International® HV™ Series trucks built 06/22/2017 thru 02/05/2020, 2018 thru 2020 International® HX® Series trucks built 11/07/2017 thru 12/10/2019, and 2018 and 2019 International® LT® and RH™ Series trucks built 03/15/2017 thru 08/06/2018 with International® A26 engines. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22518. Also complete any other open campaigns listed on the Service Portal at this time. VEHICLE RECALL 22518 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1 TOOLS REQUIRED Description EZ-Tech® or Equivalent Service Diagnostics Solutions (SOS) Battery Charger 55 Amp PARTS INFORMATION No parts for this campaign. SERVICE PROCEDURE Tool Number N/A N/A PSC550CC WARNING! To prevent personal lnJury and / or death, or damage to property, park vehicle on hard flat surface, turn the engine off, set the parking brake and install wheel chocks to prevent the vehicle from moving in either direction. WARNING! To prevent personal injury and/ or death, always wear safe eye protection when performing vehicle maintenance. WARNING! To prevent personal injury and / or death, or damage to property, allow enaine / vehicle components to cool before servicing. WARNING! To prevent personal injury and / or death, or damage to property, keep flames or sparks away from vehicle and do not smoke while servicing the vehicle’s batteries. Batteries expel explosive gases. 1. Park vehicle on flat surface. 2. Shift transmission to Park or Neutral and set parking brake. 3. Turn vehicle ignition to Key OFF position. 4. Install wheel chocks. 5. Connect to vehicle using SOS. VEHICLE RECALL 22518 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2 NOTE: Use SDS to program vehicles for this campaign. 6. Review engine calibration status in SOS. a. If calibration is NOT CURRENT, reprogram Engine Control Module (ECM) to raise calibration to latest level. Continue with Step 7. b. If calibration is CURRENT, apply template to Engine Control Module (ECM) in order to enable knock detection parameter. i. If template has not been downloaded to EZ-Tech® or equivalent, go to iKnow article IK1201473 and apply SOS template. 7. Connect battery charger/ maintainer to vehicle battery. 8. Program Engine Control Module (ECM) using SOS. NOTE: All programming and troubleshooting information can be accessed from the articles listed in the chart below, Dealer EZ-Teche, or clicking the link below to access the Service Diagnostic Solutions for sos. IK2600257 Service Diagnostic Solutions for SOS NOTE: These articles contain general information about each reprogramming method and software, with links to specific instructions. Service Diagnostics Solutions SDS Service Diagnostics Solutions (SDS) User Guide 4328790 9. If assistance is needed, contact Vehicle Programming by creating an iKNow case file or calling 1-800-336-4500, options 3, 5, 1. NOTE: Clear all inactive/ previously active faults after programming. Only perform diagnostics or procedures on ACTIVE faults and then open a new claim section on your work order. 10. If any inactive / previously active faults are found after programming, clear them from ECM. Only perform diagnostics or procedures on active faults. VEHICLE RECALL 22518 ~ 2022 Nav1Star, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 11. Disconnect battery charger I maintainer from vehicle battery. 12. Remove wheel chocks. END OF SERVICE PROCEDURE LABOR INFORMATION Operation Number Description A40-22518-1 Inspect Calibration and Recalibrate ECM CAMPAIGN IDENTIFICATION LABEL Each vehicle corrected in accordance with this campaign must be marked with a CTS-1075 Campaign Identification Label. Complete the label and attach on a clean surface next to the vehicle identification number (VIN) plate. Time 0.5 hrs COMPLETED service Locauon Cclde ‘ ADMINISTRATIVE/ DEALER RESPONSIBILITIES WARRANTY CLAIMS Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22518. Section 7 of the Warranty Policy and Procedures Manual contains further information related to the submission and processing of AFC/ Recall claims. As with all claim submissions, items acquired locally must be submitted in the “Other Charges” tab. The cost of any bulk items (such as a bag of cable tie straps, roll of wire, barrel of oil, or tube of silicone) should be prorated for the cost of the individual pieces / amount used during each repair. VEHICLE RECALL 22518 © 2022 Navistar, Inc. All rights reseived. All marks are trademarks of their respective owners. 4 GROUP NOUN C WARR. TP PAD GROUP – Enter number ,._ I I I I I I NOUN – Leave blank –~————” – C (CAUSE) – Enter either 1, 2, 3. (See below) 1. Inspected (No repair required). 2. Inspected and repaired. 3. Defective part from parts stock. – WARRANTY – (Warranty Code) Enter 40. •~———–‘ TYPE PART – Enter P for type part causing failure. ◄:———–‘ PAD- Enter 1)() .~. ,___ _____________________ _, UNITED STATES AND POSSESSIONS The National Traffic and Motor Vehicle Safety Act, as amended, provides that each vehicle that is subject to a vehicle recall campaign must be adequately repaired within a reasonable time after the owner has tendered it for repair. A failure to adequately repair within 60 days after a tender of a vehicle is prima facie evidence of failure to repair within a reasonable time. If the condition is not adequately repaired within 60 days, the owner may be entitled to replacement with an identical or reasonable equivalent vehicle at no charge, or to a refund of the purchase price less a reasonable allowance for depreciation. Dealers must correct all vehicles subject to this campaign at no charge to the owner, regardless of mileage, age of vehicle, or ownership, from this time forward. Dealers should proceed immediately to make necessary correction to units in inventory. All inventory vehicles subject to this recall campaign must be corrected prior to sale, transfer or delivery. If vehicles have been sold or transferred and you are in receipt of Customer Notification Letters and Authorization for Recall Service cards for those vehicles, the transfer location or customer must be notified immediately from your dealer location. Dealers must make every effort to promptly schedule an appointment with each owner to repair his or her vehicle as soon as possible. However, consistent with the customer notification, dealers are expected to complete the repairs on the mutually agreed upon service date. VEHICLE RECALL 22518 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 5

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IC Bus, LLC 2701 Navistar Drive Lisle, IL 60532 USA navistar.com IMPORTANT SAFETY RECALL 22514 NHTSA RECALL NO. 22V-429 This notice applies to your vehicle identified on the enclosed card. NOVEMBER 2022 Dear IC Bus Customer, This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. IC Bus has decided that a defect which relates to motor vehicle safety exists in certain 2022 and 2023 CE school bus models built 06/01/2021 thru 06/07/2022 with R. H. Sheppard HD94E, M100P, M110P, HD94P, XD120P, MD83P, SD110P, M83P, M90P, or M80P model steering gears. REASON FOR THIS RECALL The steering gears may have been assembled with less than the required input shaft ball bearings and can result in a fracture of the input shaft and loss of steering. RISK TO MOTOR VEHICLE SAFETY A loss of steering increases the risk of a vehicle crash. DEFECT REMEDY The repair will involve replacing steering gears found with a suspect serial number. Dealers have parts and instructions to repair your vehicle. The repair will be performed free of charge and take approximately 30 minutes to 1 hour and 30 minutes to complete. ACTIONS YOU SHOULD TAKE If you own this vehicle, please schedule an appointment with any IC Bus dealer to have your vehicle repaired. You can find your nearest dealer by using the dealer locator at http://www.icbus.com or by calling 1-800-448-7825. If you have already paid for repairs prior to this notice that corrected the defect, you may be eligible for reimbursement of certain repair expenses if they occurred 06/16/2021 thru 12/01/2022. Present your original repair paperwork and proof of payment to any IC Bus dealer and your eligibility will be reviewed. You may also submit a claim using the enclosed Request for Reimbursement card. If you are the lessor of this vehicle, please forward a copy of this notice to the lessee within ten days to comply with federal regulations. If you do not own this vehicle, please fill out and return mail the enclosed card so that you will not be contacted again about this recall. IF YOU NEED ASSISTANCE If you believe that IC Bus has failed to remedy the defect without charge or within a reasonable time, please follow the procedure described in the Owner Assistance Guide section in your Owner’s Manual or call toll free 1-800-448- 7825. You may also submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Ave, SE, Washington, DC 20590; 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. IC Bus requests your prompt attention and patience regarding the correction of this defect and apologizes for any inconvenience this may cause you. IC Bus, LLC

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Navistar, Inc. 2701 Navistar Drive Lisle. IL 60532 USA navlstar.com IMPORTANT SAFETY RECALL 22518 NHTSA RECALL NO. 22V-691 This notice applies to your vehicle identified on the enclosed card. Dear INTERNATIONAL• Customer, This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Navistar has decided that a defect which relates to motor vehicle safety exists in certain 2018 thru 2021 HV® series trucks buU 06/22/2017 thru 02/05/2020, 2018 thru 2020 HX® series trucks built 11/07/2017 thru 12/10/2019, and 2018 and 2021 LT® and RH® series trucks built 0311512017 thru 12/05/2019 with International A26 engines. REASON FOR THIS RECALL The connecting rod bushing over time may develop cracks or lose chunks of material, which could lead to connecting rod failure. RISK TO MOTOR VEHICLE SAFETY Connecting rod failure in some cases can result in engine shutdown with minimal warning; a stalled vehicle in or near the roadway can increase the risk of a vehicle crash. DEFECT REMEDY The repair will involve the installation of an engine calibration to warn the driver prior to engine connecting rod failure. Authorized repair locations have software and instructions to repair your vehicle. The repair will be performed free of charge and take approximately 45 minutes to complete. ACTIONS YOU SHOULD TAKE If you own this vehicle, please contact any INTERNATIONAL® dealer or a Love’s Truck Tire Care or Speedco• location to have your vehicle repaired at no cost to you. You can find your nearest service location by calling 1-800-448-7825 or by using the service locator at http://www.internationaltrucks.com or https://www.loves.com . *Love’s and Speedco locations in Texas cannot perform warranty services. ~~□~ FEB! 4 202) By.: ££ttL!i .1.- ~…~.. ..- .-. A NAVISTAR COMPANY FEBRUARY 2023 If you have already paid for repairs prior to this notice that corrected the defect, you may be eligible for reimbursement of certain repair expenses if they occurred 09/15/2021 thru 03/06/2023. Present your original repair paperwork and proof of payment to any INTERNATIONAL® dealer and your eligibility wlll be reviewed. You may also submit a claim using the enclosed Request for Reimbursement card. If you are the lessor of this vehicle, please forward a copy of this notice to the tessee within ten days to comply with federal regulations. If you do not own this vehicle, please fill out and return mail the enclosed card so that you will not be contacted again about this recall. NOTE: Once the detection system is installed; should the red engine light on the instrument cluster illuminate, safely pull your truck off the roadway when safe to do so, turn off the engine and contact your nearest International dealer. If an engine repair is required due to a rod failure, it will be covered under wallanty. IF YOU NEED FURTHER ASSISTANCE If you believe that Navistar has failed to remedy the defect without charge or within a reasonable time, please follow the procedure described in the Owner Assistance Guide section in your Owner’s Manual or call toll free 1-800-448-7825. You may also submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Ave, SE, Washington, DC 20590; 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. Navistar requests your prompt attention and patience regarding the correction of this defect and apologizes for any inconvenience this may cause you. Navistar, Inc.

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Navistar, Inc. 2701 Navistar Drive Lisle. IL 60532 USA navlstar.com IMPORTANT SAFETY RECALL 22518 NHTSA RECALL NO. 22V-691 This notice applies to your vehicle identified on the enclosed card. Dear INTERNATIONAL«> Customer, This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Navistar has deckied that a defect which relates to motor vehicle safety exists in certain 2018 thru 2021 HV® series trucks built 06/22/2017 thru 02/05/2020, 2018 thru 2020 HX® series trucks built 11107/2017 thru 12/10/2019, and 2018 and 2019 LT® and RH® series trucks built 03/1512017 thru 08/06/2018 with International A26 engines. REASON FOR THIS RECALL The connecting rod bushing over time may develop cracks or lose chunks of material, which could fead to connecting rod failure. RISK TO MOTOR VEHICLE SAFETY Connecting rod failure in some cases can result in engine shutdown with minimal warning; a stalled vehicle in or near the roadway can increase the risk of a vehicle crash. DEFECT REMEDY The repair will involve the installation of an engine calibration to warn the driver prior to engine connecting rod failure. Authorized repair locations have software and instructions to repair your vehicle. The repair will be performed free of charge and take approximately 45 minutes to complete. ACTIONS YOU SHOULD TAKE If you own this vehicle, please contact any INTERNATIONAL® dealer or a Love’s Truck Tire Care or Speedco* location to have your vehicle repaired at no cost to you. You can find your nearest service location by calling 1-800-448-7825 or by using the service locator at http://www.internationaltrucks.com or https://www.loves.com . *Love’s and Speedco locations in Texas cannot perform warranty services. [1YXJ&D °=rn@ NOV 14 2022 By: f~~f.’f:::tf.~~-* A NAVISTAR COMPANY NOVEMBER 2022 If you have already paid for repairs prior to this notice that corrected the defect, you may be eligible for reimbursement of certain repair expenses if they occurred 09/15/2021 thru 11/25/2022. Present your original repair paperwork and proof of payment to any INTERNATIONAL® dealer and your eligibility will be reviewed. You may also submit a claim using the enclosed Request for Reimbursement card. If you are the lessor of this vehicle, please forward a copy of this notice to the lessee within ten days to comply with federal regulations. If you do not own this vehicle, please fill out and return mail the enclosed card so that you will not be contacted again about this recall. NOTE: Once the detection system is installed; should the red engine fight on the instrument cluster illuminate, safely puff your truck off the roadway when safe to do so, turn off the engine and contact your nearest International dealer. If an engine repair is required due to a rod failure, it will be covered under wa”anty. IF YOU NEED FURTHER ASSISTANCE If you believe that Navistar has failed to remedy the defect without charge or within a reasonable time, please follow the procedure described in the Owner Assistance Guide section in your Owner’s Manual or call toll free 1-800-448-7825. You may also submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Ave, SE, Washington, DC 20590; 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. Navistar requests your prompt attention and patience regarding the correction of this defect and apologizes for any inconvenience this may cause you. Navistar, Inc.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-691 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : SEP 15, 2022 NHTSA Recall No. : 22V-691 Manufacturer Recall No. : 22518 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 6,883 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2018-2021 International HV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 3,451 HV series trucks in the suspect population. Production Dates : JUN 22, 2017 – FEB 05, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2018-2020 International HX Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 402 HX series trucks in the suspect population. Production Dates : NOV 07, 2017 – DEC 10, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-691 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2018-2019 International LT Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 1,900 LT series trucks in the suspect population. Production Dates : MAR 15, 2017 – AUG 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2018-2019 International RH Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 1,130 RH series trucks in the suspect population. Production Dates : MAR 15, 2017 – MAY 18, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The bushing material in the small end bore (wrist pin of rod) of the connecting rod over time may develop cracks or lose chunks of bushing material and could lead to connecting rod engine failure. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Connecting rod failure in some cases can result in engine shutdown with minimal warning; while the driver can usually pull the truck to the side of the roadway, a stalled vehicle in or near the roadway can increase the risk of a vehicle crash. Description of the Cause : The wrist pin bore of the connecting rod was machined outside the design tolerance for straightness. Part 573 Safety Recall Report 22V-691 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : The operator may hear a knocking noise, notice an engine warning light, or experience rough idle. Involved Components : Component Name 1 : Connecting rod Component Description : Connects piston to crankshaft Component Part Number : International P/N 7096533C91 Supplier Identification : Component Manufacturer Name : Camtac Manufacturing Address : 148 Arrow Rd. Guelph, ON, Canada Foreign States N1K 1T4 Country : Canada Chronology : • 06/17/2022 – Navistar Aftersales, Compliance, and Reliability & Quality (R&Q) meet to discuss A26 engine connecting rod failures on engines occurring outside of recall 21505 and initiates root cause analysis investigation. • 08/11/2022 – Navistar concludes its root cause investigation of connecting rod failures outside the previous recall population. • 08/25/2022 – Root cause analysis is presented to Navistar’s Compliance Committee and requests the team to determine the impact to International vehicles. • 09/07/2022 – Navistar finalizes the suspect population of vehicles outside the previous safety recall. • 09/08/2022 – Navistar declares a Safety Recall. Part 573 Safety Recall Report 22V-691 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : • The remedy will involve installing a new knock detection system software to warn the driver prior to engine connecting rod failure. The system will light a red engine warning light giving the driver an indication to stop the engine as soon as it can safely be done. Engines found with a suspect connecting rod will be repaired under warranty. • Navistar’s plan for reimbursement of pre-notification remedies, on file with NHTSA and dated 05/06/2022, applies and reimbursement instructions will be included in the customer notification. How Remedy Component Differs from Recalled Component : The remedy will include the installation of a new knock detection system software, which will activate the engine malfunction indicator lamp. Vehicles without this remedy either had a less effective detection system, or no detection system at all. Identify How/When Recall Condition was Corrected in Production : 11/18/2019 – Navistar engine production changed to Albon Engineering and Manufacturing as the new connecting rod supplier starting with ESN 4521933. Recall Schedule : Description of Recall Schedule : It is estimated that the customer and dealer notification letters will be mailed by 11/14/2022. Planned Dealer Notification Date : NOV 14, 2022 – NOV 14, 2022 Planned Owner Notification Date : NOV 14, 2022 – NOV 14, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-691 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : DEC 28, 2022 NHTSA Recall No. : 22V-691 Manufacturer Recall No. : 22518 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 7,918 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2018-2021 International LT Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. • After recall 22518 (22V-691) was declared, it was determined that additional population subject to recall 21505 (21V-281) may not have been properly remedied. That additional population is now being added to the suspect population to recall 22518 (22V-691). There are 2,431 LT series trucks in the suspect population. Production Dates : MAR 15, 2017 – AUG 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-691 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 2 : 2018-2021 International RH Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. • After recall 22518 (22V-691) was declared, it was determined that additional population subject to recall 21505 (21V-281) may not have been properly remedied. That additional population is now being added to the suspect population to recall 22518 (22V-691). There are 1,634 RH series trucks in the suspect population. Production Dates : MAR 15, 2017 – DEC 05, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2018-2021 International HV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. • After recall 22518 (22V-691) was declared, it was determined that additional population subject to recall 21505 (21V-281) may not have been properly remedied. That additional population is now being added to the suspect population to recall 22518 (22V-691). There are 3,451 HV series trucks in the suspect population. Production Dates : JUN 22, 2017 – FEB 05, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-691 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2018-2020 International HX Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. • After recall 22518 (22V-691) was declared, it was determined that additional population subject to recall 21505 (21V-281) may not have been properly remedied. That additional population is now being added to the suspect population to recall 22518 (22V-691). There are 402 HX series trucks in the suspect population. Production Dates : NOV 07, 2017 – DEC 10, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The bushing material in the small end bore (wrist pin of rod) of the connecting rod over time may develop cracks or lose chunks of bushing material and could lead to connecting rod engine failure. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Connecting rod failure in some cases can result in engine shutdown with minimal warning; while the driver can usually pull the truck to the side of the roadway, a stalled vehicle in or near the roadway can increase the risk of a vehicle crash. Description of the Cause : The wrist pin bore of the connecting rod was machined outside the design tolerance for straightness. Identification of Any Warning that can Occur : The operator may hear a knocking noise, notice an engine warning light, or experience rough idle. Involved Components : Part 573 Safety Recall Report 22V-691 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Connecting rod Component Description : Connects piston to crankshaft Component Part Number : International P/N 7096533C91 Supplier Identification : Component Manufacturer Name : Camtac Manufacturing Address : 148 Arrow Rd. Guelph, ON, Canada Foreign States N1K 1T4 Country : Canada Chronology : • 06/17/2022 – Navistar Aftersales, Compliance, and Reliability & Quality (R&Q) meet to discuss A26 engine connecting rod failures on engines occurring outside of recall 21505 and initiates root cause analysis investigation. • 08/11/2022 – Navistar concludes its root cause investigation of connecting rod failures outside the previous recall population. • 08/25/2022 – Root cause analysis is presented to Navistar’s Compliance Committee and requests the team to determine the impact to International vehicles. • 09/07/2022 – Navistar finalizes the suspect population of vehicles outside the previous safety recall. • 09/08/2022 – Navistar declares a Safety Recall. • 09/23/2023 – Navistar Programming Support determines new electronic service tool Service Diagnostic Software is not enabling the Knock detection software parameters for vehicles in previous Safety Recall 21V281 • 11/01/2022 – Navistar Programming Support updates Service Diagnostic Software released to International dealers. • 11/02/16 – 12/16/22 continuing investigation into service tool yields additional population subject to 21V281 may not have been properly remedied. • 12/21/2022 – Navistar approves additional population to be added to Safety Recall 22V691. Customer notices will be mailed and vehicles will be properly remedied. Part 573 Safety Recall Report 22V-691 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : • The remedy will involve installing a new knock detection system software to warn the driver prior to engine connecting rod failure. The system will light a red engine warning light giving the driver an indication to stop the engine as soon as it can safely be done. Engines found with a suspect connecting rod will be repaired under warranty. • Navistar’s plan for reimbursement of pre-notification remedies, on file with NHTSA and dated 05/06/2022, applies and reimbursement instructions will be included in the customer notification. How Remedy Component Differs from Recalled Component : The remedy will include the installation of a new knock detection system software, which will activate the engine malfunction indicator lamp. Vehicles without this remedy either had a less effective detection system, or no detection system at all. Identify How/When Recall Condition was Corrected in Production : 11/18/2019 – Navistar engine production changed to Albon Engineering and Manufacturing as the new connecting rod supplier starting with ESN 4521933. Recall Schedule : Description of Recall Schedule : It is estimated that the customer and dealer notification letters will be mailed by 01/31/2023. Planned Dealer Notification Date : JAN 31, 2023 – JAN 31, 2023 Planned Owner Notification Date : JAN 31, 2023 – JAN 31, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-691 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : OCT 04, 2022 NHTSA Recall No. : 22V-691 Manufacturer Recall No. : 22518 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 6,883 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2018-2021 International HV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 (21V-281) population to include all A26 engines with connecting rods manufactured by the same supplier. • The vehicles included in the suspect population were not included in the original population recalled in 21V-281 because at that time this defect was determined to be tied to supplier tool maintenance practices which was evident in warranty claim metrics. Failures for the earlier build range and for HV/HX models were significantly lower at that time. A recent study of new failures shows an increase in the earlier build period and for HV and HX models so out of abundance of caution Navistar has decided to provide the remedy for all engines with connecting rods manufactured by this supplier. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 3,451 HV series trucks in the suspect population. Production Dates : JUN 22, 2017 – FEB 05, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-691 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 2 : 2018-2020 International HX Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 402 HX series trucks in the suspect population. Production Dates : NOV 07, 2017 – DEC 10, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2018-2019 International LT Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 1,900 LT series trucks in the suspect population. Production Dates : MAR 15, 2017 – AUG 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2018-2019 International RH Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models equipped with International A26 engines (A26 engine) and built outside of recall 21505 population. • The inclusive dates of manufacturing were determined by certain engine serial numbers of the A26 engines built with suspect connecting rods. • The vehicles in the suspect population were built with certain A26 engines built with suspect connecting rods; and all other vehicles either have A26 engines without suspect connecting rods or have other engine models. There are 1,130 RH series trucks in the suspect population. Production Dates : MAR 15, 2017 – MAY 18, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-691 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : The bushing material in the small end bore (wrist pin of rod) of the connecting rod over time may develop cracks or lose chunks of bushing material and could lead to connecting rod engine failure. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Connecting rod failure in some cases can result in engine shutdown with minimal warning; while the driver can usually pull the truck to the side of the roadway, a stalled vehicle in or near the roadway can increase the risk of a vehicle crash. Description of the Cause : The wrist pin bore of the connecting rod was machined outside the design tolerance for straightness. Identification of Any Warning that can Occur : The operator may hear a knocking noise, notice an engine warning light, or experience rough idle. Involved Components : Component Name 1 : Connecting rod Component Description : Connects piston to crankshaft Component Part Number : International P/N 7096533C91 Supplier Identification : Component Manufacturer Name : Camtac Manufacturing Address : 148 Arrow Rd. Guelph, ON, Canada Foreign States N1K 1T4 Country : Canada Chronology : • 06/17/2022 – Navistar Aftersales, Compliance, and Reliability & Quality (R&Q) meet to discuss A26 engine connecting rod failures on engines occurring outside of recall 21505 and initiates root cause analysis investigation. • 08/11/2022 – Navistar concludes its root cause investigation of connecting rod failures outside the previous recall population. • 08/25/2022 – Root cause analysis is presented to Navistar’s Compliance Committee and requests the Part 573 Safety Recall Report 22V-691 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 team to determine the impact to International vehicles. • 09/07/2022 – Navistar finalizes the suspect population of vehicles outside the previous safety recall. • 09/08/2022 – Navistar declares a Safety Recall. Description of Remedy : Description of Remedy Program : • The remedy will involve installing a new knock detection system software to warn the driver prior to engine connecting rod failure. The system will light a red engine warning light giving the driver an indication to stop the engine as soon as it can safely be done. Engines found with a suspect connecting rod will be repaired under warranty. • Navistar’s plan for reimbursement of pre-notification remedies, on file with NHTSA and dated 05/06/2022, applies and reimbursement instructions will be included in the customer notification. How Remedy Component Differs from Recalled Component : The remedy will include the installation of a new knock detection system software, which will activate the engine malfunction indicator lamp. Vehicles without this remedy either had a less effective detection system, or no detection system at all. Identify How/When Recall Condition was Corrected in Production : 11/18/2019 – Navistar engine production changed to Albon Engineering and Manufacturing as the new connecting rod supplier starting with ESN 4521933. Recall Schedule : Description of Recall Schedule : It is estimated that the customer and dealer notification letters will be mailed by 11/14/2022. Planned Dealer Notification Date : NOV 14, 2022 – NOV 14, 2022 Planned Owner Notification Date : NOV 14, 2022 – NOV 14, 2022 * NR – Not Reported

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