22525 Hex Flange Lock Nut May Break – 2023 IC Bus CE, EV, & RE

SEOCONTENT-START

@~ □@~RV/CE PROCEDURE JAN 2 0 2023 Compliance Dept 22525 / 22559 JANUARY, 2023 SUBJECT: SAFETY RECALL 22525 Variation 22559 Hex Flange Lock Nut on certain IC Bus® RE Series buses built 04/28/2022 thru 08/02/2022. CUSTOMER LETTER NOTE: Customer will receive letter indicating Safety Recall 22525, however the recall card will indicate the required repair remedy variation. The proper remedy variation for a specific VIN can be found on the International® Service Portal8M summary tab under OPEN RECALLS. Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION A specific hex flange lock nut used in several, but not all, steering and/ or suspension locations may have not been properly formed and heat treated to Navistar specifications and can result in a loss of joint tension as the vehicle ages. A loss of joint tension in these joints may affect vehicle handling and could contribute to a vehicle crash. MODELS INVOLVED This safety recall involves certain IC Bus• RE Series buses built 04/28/2022 thru 08/02/2022. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22559. Also complete any other open campaigns listed on the Service Portal at this time. PARTS INFORMATION Part Number Part Description Quantity 1675448C1 NUT HEXAGON FLGD LOCK¾ X 16 UNF-2B 10 VEHICLE RECALL 22559 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1 SERVICE PROCEDURE WARNING! To prevent personal mJury 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, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. WARNING! To prevent personal injury and/ or death, always wear safe eye protection when performing vehicle maintenance. 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. Using jack, raise front axle and support vehicle on jack stands. VEHICLE RECALL 22559 © 2023 Navistar, Inc. All rights reserved. AU marks are trademarks of their respective owners. 2 Figure 1. Steer Axle Shackle 1. Nut (3) 1 0000476673 WARNING! To prevent personal injury and / or death, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. 6. Access nuts (Figure 1, Item 1) securing the front steer axle shackle. NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 7. Remove and replace nuts (Figure 1, Item 1 }. Using a torque wrench, tighten nuts to 330 – 370 lb-ft (450 – 500 N·m}. 8. Repeat Steps 6 and 7 for opposite side. VEHICLE RECALL 22559 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 0000476640 Figure 2. TRW Pitman Arm Nut and Steering Gear Mounting 1 . Pitman arm nut 2. Steering gear nut (3) NOTE: If necessary, rotate steering wheel to allow for access. 9. Access Pitman arm nut (Figure 2, Item 1) securing pinch bolt. NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 10. Remove and replace nut. Using a torque wrench and backup wrench positioned on bolt, tighten nut to 330 – 370 lb-ft (450 – 500 N·m). 11. Access three steering gear mounting nuts (Figure 2, Item 2). NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 12. Remove and replace nuts one at a time. Using a torque wrench and backup wrench positioned on bolt, tighten nut to 330 – 370 lb-ft (450 – 500 N-m). VEHICLE RECALL 22559 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4 13. Raise vehicle, remove jack stands, and lower vehicle. 14. Remove wheel chocks. END OF SERVICE PROCEDURE LABOR INFORMATION Operation Number Description A40-22559-1 Replace All Affected Hex Flange Lock Nuts 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. ADMINISTRATIVE / DEALER RESPONSIBILITIES WARRANTY CLAIMS Time 0.8 hr COMPLETED Service Location CGde ‘ Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22559. 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 22559 © 2023 Navistar, Inc. All rfghts reserved. All marks are trademarks of their respective owners. 5 GROUP GROUP – Enter n NOUN – Leave b umber lank ,.;;: +– I – C (CAUSE)- Enter either 1, 2, 3. (See below) 1. Inspected (No repair required). 2. Inspected and repaired. 3. Defective p art from parts stock. – arranty Code) Enter 40. ~ I I WARRANTY – 0/v TYPE PART – En PAD – Enter 1lO ter P for type part causing failure. …;, — UNITED STATES AND POSSESSIONS NOUN C WARR. TP PAO I I l I OOCOC41910 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 22559 C 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 6 Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. CANADA 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. EXPORT Export Distributors 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 distributor location. Export Distributors are to submit warranty claims in the usual manner making reference to this recall number. VEHICLE RECALL 22559 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 7 Export Distributors are expected to provide full cooperation and follow-up with respect to this important subject matter. If you have any questions or peed further assistance, please contact the Regional Service Manager at ydur·regional office. NAVISTAR, INC. VEHICLE RECALL 22559 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 8

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

~~ERV/CE PROCEDURE ©~ □@□® . JAN 2 0 2023 22525 I 22556 JANUARY, 2023 SAFETY RECALL 22525 Variation 22556 Hex Flange Lock Nut on certain IC Bus® CE Series buses built 02/01/2022 thru 08/17/2022 and certain IC Bus® Electric CE Series vehicles built 02/08/2022 thru 02/21/2022. CUSTOMER LETTER NOTE: Customer will receive letter indicating Safety Recall 22525, however the recall card will indicate the required repair remedy variation. The proper remedy variation for a specific VIN can be found on the International® Service Portal5M summary tab under OPEN RECALLS. Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION A specific hex flange lock nut used in several, but not all, steering and/ or suspension locations may have not been properly formed and heat treated to Navistar’s specifications and can result in a loss of joint tension as the vehicle ages. A loss of joint tension in these joints may affect vehicle handling and could contribute to a vehicle crash. MODELS INVOLVED This safety recall involves certain IC Bus® CE Series vehicles built 02/01/2022 thru 08/17/2022 and certain IC Bus® Electric CE Series vehicles built 02/08/2022 thru 02/21/2022. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22556. Also complete any other open campaigns listed on the Service Portal at this time. VEHICLE RECALL 22556 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1 PARTS INFORMATION Part Number Part Description Quantity 1675448C1 NUT HEXAGON FLGD LOCK 3/4X16UNF-28 6 SERVICE PROCEDURE WARNING! To prevent personal mJury 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, or damage to property, If the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. WARNING! To prevent personal injury and/ or death, always wear safe eye protection when performing vehicle maintenance. 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. Unlatch and open hood. 6. Using jack, raise front axle and support vehicle on jack stands. VEHICLE RECALL 22556 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2 1 ———— ~ ,;;…., _______ _ —– – — — (J r,JLe~ 0 …, I Figure 1. Typical Steer Axle Shackle 1. Nut (3) ——~ 0000478673 WARNING! To prevent personal injury and I or death, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. 7. Access nuts (Figure 1, Item 1) securing the front steer axle shackle. NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 8. Remove and replace nuts (Figure 1, Item 1 ). Using a torque wrench, tighten nuts to 330 – 370 lb-ft (450 – 500 N·m). 9. Repeat Steps 7 and 8 for opposite side. 10. Raise vehicle, remove jack stands, and lower vehicle. VEHICLE RECALL 22556 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 11. Close and latch hood. 12. Remove wheel chocks. END OF SERVICE PROCEDURE LABOR INFORMATION Operation Number Description A40-22556-1 Replace All Affected Hex Flange Lock Nuts 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. ADMINISTRATIVE / DEALER RESPONSIBILITIES WARRANTY CLAIMS Time 0.6 hr COMPLETED Service Locauon Code ‘ Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22556. 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 22556 0 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4 GROUP GROUP – Enter nu mber NOUN – Leave b lank ~ +- I – C {CAUSE)- Ente r either 1, 2, 3. (See below) 1. Inspected (No repair required). 2. Inspected and repaired. 3. Defective part from parts stock. – arranty Code) Enter 40. I I WARRANTY – (W TYPE PART – En PAO – Enter 1)() ter P for type part causing failure. ~ — UNITED STATES AND POSSESSIONS NOUN C WARR. TP PAO I I I I 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 22556 © 2023 Navistar, tnc. All rights reserved. All marks are trademarks of their respective owners. 5 Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. CANADA 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. EXPORT Export Distributors 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 distributor location. Export Distributors are to submit warranty claims in the usual manner making reference to this recall number. VEHICLE RECALL 22556 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 6 Export Distributors are expected to provide full cooperation and follow-up with respect to this important subject matter. If you have any questions or need further assistance, please contact the Regional Service Manager at your regional office. NAVISTAR, INC. VEHICLE RECALL 22556 © 2023 Navistar, fnc. All rights reserved. All marks are trademarks of their respective owners. 7

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

-~~RWCEPROCEDURE ©~ □@□® JAN 2 0 2023 22525 I 22557 JANUARY, 2023 CT: SAFETY RECALL 22525 Variation 22557 Hex Flange Lock Nut on certain IC Bus® CE Series buses built 02/25/2022 thru 02/28/2022 and certain IC Bus® Electric CE Series vehicles built on 02/28/2022. CUSTOMER LETTER NOTE: Customer will receive letter indicating Safety Recall 22525, however the recall card will indicate the required repair remedy variation. The proper remedy variation for a specific VIN can be found on the International® Service Portal5M summary tab under OPEN RECALLS. Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION A specific hex flange lock nut used in several, but not all, steering and I or suspension locations may have not been properly formed and heat treated to Navistar’s specifications and can result in a loss of joint tension as the vehicle ages. A loss of joint tension in these joints may affect vehicle handling and could contribute to a vehicle crash. MODELS INVOLVED This Safety Recall involves certain IC Bus® CE Series models built 02/25/2022 thru 02/28/2022 and certain IC Bus® Electric CE Series models built on 02/28/2022. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22557. Also complete any other open campaigns listed on the Service Portal at this time. VEHICLE RECALL 22557 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of thelr respective owners. PARTS INFORMATION Part Number Part Description Quantity 1675448C1 NUT HEXAGON FLGD LOCK 3/4X16UNF-2B 1 SERVICE PROCEDURE WARNING! To prevent personal mJury 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, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. WARNING! To prevent personal Injury and/ or death, always wear safe eye protection when performing vehicle maintenance. 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. Unlatch and open hood. VEHICLE RECALL 22557 ©> 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2 Figure 1. TRW Pitman Arm Nut 1. Nut NOTE: If necessary, rotate steering wheel to allow for access. 6. Access Pitman arm nut (Figure 1, Item 1 ). NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 7. Remove and replace nut. Using a torque wrench and backup wrench positioned on bolt, tighten nut to 330-370 lb-ft (450-500 N·m). 8. Close and latch hood. 9. Remove wheel chocks. END OF SERVICE PROCEDURE VEHICLE RECALL 22557 0000470~ @ 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 LABOR INFORMATION Operation Number Description A40-22557-1 Replace All Affected Hex Flange Lock Nuts 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. ADMINISTRATIVE / DEALER RESPONSIBILITIES WARRANTY CLAIMS Time 0.3 hr COMPLETED Service Locauon Code , Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22557. 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 22557 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4 GROUP GROUP – Enter nu mber NOUN – Leave b lank ~ +– I – C (CAUSE) – Ente r either 1, 2, 3. (See below) 1. Inspected (No repair required). 2. Inspected and repaired. 3. Defective part from parts stock. – arranty Code) Enter 40. ~ I I WARRANTY – rN TYPE PART – En PAO – Enter 1)() ter P for type part causing failure. ~ — UNITED STATES AND POSSESSIONS NOUN C WARR. TP PAD I I I I OiJ:Xlll4JHO The National Traffic and Motor Vehicle Safety Act, as amended, provides that each vehicle that ls 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 22557 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 5 Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. CANADA 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. EXPORT Export Distributors 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 distributor location. Export Distributors are to submit warranty claims in the usual manner making reference to this recall number. VEHICLE RECALL 22557 @ 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 6 Export Distributors are expected to provide full cooperation and follow-up with respect to this important subject matter. If you have any questions or need further assistance, please contact the Regional Service Manager at your regional office. NAVISTAR, INC. VEHICLE RECALL 22557 @ 2023 Navistar, Inc. AU rights reserved. All marks are trademarks of their respective owners. 7 ..

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

~©~OO□~@~RWCEPROCEDURE JAN 2 0 2023 22525 I 22558 JANUARY, 2023 Compliance Dept SUBJECT: SAFETY RECALL 22525 Variation 22558 Hex Flange Lock Nut on certain IC Bus® RE buses built 02/25/2022 thru 08/15/2022. CUSTOMER LETTER NOTE: Customer will receive letter indicating Safety Recall 22525, however the recall card will indicate the required repair remedy variation. The proper remedy variation for a specific VIN can be found on the International® Service Portal5M summary tab under OPEN RECALLS Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION A specific hex flange lock nut used in several, but not all, steering and/ or suspension locations may have not been properly formed and heat treated to Navistar’s specifications and can result in a loss of joint tension as the vehicle ages. A loss of joint tension in these joints may affect vehicle handling and could contribute to a vehicle crash. MODELS INVOLVED This safety recall involves certain IC Bus® RE bus models built 02/25/2022 thru 08/15/2022. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22558. Also complete any other open campaigns listed on the Service Portal at this time. PARTS INFORMATION Part Number Part Description Quantity 1675448C1 NUT HEXAGON FLGD LOCK ¾ X 16 UNF-2B 4 VEHICLE RECALL 22558 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1 SERVICE PROCEDURE GOVERNMENT REGULATION: Engine fluid (oil, fuel, and coolant) may be a hazard to human health and the environment. Handle all fluid and other contaminated materials (such as filters and rags) in accordance with applicable regulations. Recycle or dispose of engine fluids, filters, and other contaminated materials according to applicable regulations. WARNING! To prevent personal injury 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, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. 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 engine I 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. WARNING! To prevent personal injury and / or death, or damage to property, remove the ground cable from the negative terminal of the battery box before disconnecting any electrical components. Always connect the ground cable last. 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. VEHICLE RECALL 22558 © 2023 Navistar. Inc. All rights reserved. All marks are trademarks of their respective owners. 2 4. Install wheel chocks. 5. Using jack, raise front axle and support vehicle on jack stands. 0000476640 Figure 1. TRW Pitman Arm Nut and Steering Gear Mounting 1. Pitman arm nut 2. Steering gear nut (3) NOTE: If necessary, rotate steering wheel to allow for access. 6. Access Pitman arm nut (Figure 1, Item 1) securing pinch bolt. NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 7. Remove and replace nut. Using a torque wrench and backup wrench positioned on bolt, tighten nut to 330 – 370 lb-ft (450 – 500 N•m). 8. Access three steering gear mounting nuts (Figure 1, Item 2). VEHICLE RECALL 22558 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 9. Remove and replace nuts one at a time. Using a torque wrench and backup wrench positioned on bolt, tighten nut to 330 – 370 lb-ft (450 – 500 N·m). 10. Raise vehicle, remove jack stands, and lower vehicle. 11 . Remove wheel chocks. END OF SERVICE PROCEDURE LABOR INFORMATION Operation Number Description Time A40-22558-1 Replace All Affected Hex Flange Lock Nuts 0.5 hr 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. ADMINISTRATIVE / DEALER RESPONSIBILITIES WARRANTY CLAIMS COMPLETED Service LocaUon COde ‘ Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22558. 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 22558 e 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4 GROUP GROUP – Enter nu mber NOUN – Leave b lank ~ +- I – C (CAUSE) – Ente r either 1, 2, 3. (See below) 1. Inspected (No repair required). 2. Inspected and repaired. 3. Defective part from parts stock. – arranty Code) Enter 40. -: I WARRANTY – f,N TYPE PART – En PAD – Enter 1)() ter P for type part causing failure. — UNITED STATES AND POSSESSIONS I ~ – NOUN C WARR. TP PAO I I I I 0000C4mo 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to th is campaign because the list VEHICLE RECALL 22558 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 5 may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. CANADA 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. EXPORT Export Distributors 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 distributor location. Export Distributors are to submit warranty claims in the usual manner making reference to this recall number. Export Distributors are expected to provide full cooperation and follow-up with respect to this important subject matter. If you have any questions or need further assistance, please contact the Regional Service Manager at your regional office. VEHICLE RECALL 22558 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 6 NAVISTAR, INC. VEHICLE RECALL 22558 ® 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 7

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

©~ □~ JAN 2 0 2023 RV/CE PROCEDURE Compliance Dept 22525 / 22560 JANUARY, 2023 SUBJECT: SAFETY RECALL 22525 Variation 22560 Hex Flange Lock Nut on certain IC Bus® CE Series and Electric CE Series vehicles built 03/01/2022 thru 08/17/2022. CUSTOMER LETTER NOTE: Customer will receive letter indicating Safety Recall 22525, however the recall card will indicate the required repair remedy variation. The proper remedy variation for a specific VIN can be found on the International® Service Portal8M summary tab under OPEN RECALLS. Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION A specific hex flange lock nut used in several, but not all, steering and I or suspension locations may have not been properly formed and heat treated to Navistar’s specifications and can result in a loss of joint tension as the vehicle ages. A loss of joint tension in these joints may affect vehicle handling and could contribute to a vehicle crash. MODELS INVOLVED This Safety Recall involves certain IC Bus® CE Series and Electric CE Series vehicles built 03/01/2022 thru 08/17/2022. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22560. Also complete any other open campaigns listed on the Service Portal at this time. PARTS INFORMATION Part Number Part Description Quantity 1675448C1 NUT HEXAGON FLGD LOCK 3/4X16UNF-2B 7 VEHICLE RECALL 22560 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1 SERVICE PROCEDURE WARNING! To prevent personal mJury 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, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. WARNING! To prevent personal injury and/ or death, always wear safe eye protection when performing vehicle maintenance. 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. Unlatch and open hood. 6. Using jack, raise front axle and support vehicle on jack stands. VEHICLE RECALL 22560 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2 0 0-.,. 0…. _______ _ —— – — , — 0 rrJ~e~ 0 ‘I I Figure 1. Steer Axle Shackle 1. Nut (3) ———- 00004 7$173 WARNING! To prevent personal injury and / or death, or damage to property, if the vehicle must be raised, do not work under the vehicle supported only by jacks. Jacks can slip or fall over. 7. Access nuts (Figure 1, Item 1) securing the front steer axle shackle. NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 8. Remove and replace nuts (Figure 1, Item 1 ). Using a torque wrench, tighten nuts to 330 – 370 lb-ft (450 – 500 N·m). 9. Repeat Steps 7 and 8 for opposite side. VEHICLE RECALL 22560 © 2023 Navlstar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 ——- Figure 2. TRW Pitman Arm Nut 1. Nut ~ …….. NOTE: If necessary, rotate steering wheel to allow for access. 10. Access Pitman arm nut (Figure 2, Item 1 ). NOTE: After installation of each nut, ensure at least one thread is protruding past the top edge of the nut. 0000476569 11. Remove and replace nut. Using a torque wrench and backup wrench positioned on bolt, tighten nut to 330 – 370 lb-ft (450 – 500 N·m). 12. Raise vehicle, remove jack stands, and lower vehicle. 15. Close and latch hood. 16. Remove wheel chocks. END OF SERVICE PROCEDURE LABOR INFORMATION Operation Number I Description Time A40-22560-1 I Replace All Affected Hex Flange Lock Nuts 0 .6 hr VEHICLE RECALL 22560 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4 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. ADMINISTRATIVE / DEALER RESPONSIBILITIES WARRANTY CLAIMS COMPLETED suvlct Location COd1, Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22560. 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. GROUP – Enter nu mber NOUN – Leave b lank ~ ._ I GROUP I I – C (CAUSE) – Ente r either 1, 2, 3. (See below) 1. Inspected (No repair required). 2. Inspected and repaired. 3. Defective p art from parts stock. – WARRANTY – 0/t/ arranty Code) Enter 40. ~ TYPE PART – En PAD – Enter ’00 ter P for type part causing failure. .:; ~ – VEHICLE RECALL 22560 NOUN C WARR. TP PAD I I I I COQCXl41910 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 5 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. CANADA 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. VEHICLE RECALL 22560 e 2023 Navistar, Inc. All rights reserved. AU marks are trademarks of their respective owners. 6 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. Dealers involved in the recall process will be furnished a listing of owner names and addresses to enable them to follow up with owners and have the vehicles corrected. Use of this listing must be limited to this campaign because the list may contain information obtained from state motor vehicle registration records, and the use of such motor vehicle registration data for purposes other than this campaign is a violation of law in several states. EXPORT Export Distributors 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 distributor location. Export Distributors are to submit warranty claims in the usual manner making reference to this recall number. Export Distributors are expected to provide full cooperation and follow-up with respect to this important subject matter. If you have any questions or need further assistance, please contact the Regional Service Manager at your regional office. NAVISTAR, INC. VEHICLE RECALL 22560 © 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 7

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

A&IVISr;uf COMPANY IC Bus, LLC 2701 Navistar Drive Lisle. IL 60532 USA navistar.com IMPORTANT SAFETY RECALL 22525 NHTSA RECALL NO. 22V-870 This notice applies to your vehicle identified on the enclosed card. 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 2023 CE, EV, RE school bus models built 02/21/2022 thru 08/17/2022. REASON FOR THIS RECALL A specific hex flange lock nut used in several, but not all, steering and/or suspension locations may have not been properly formed and heat treated to Navistar’s specifications and can result in a loss of joint tension as the vehicle ages. RISK TO MOTOR VEHICLE SAFETY A loss of joint tension in these joints may affect vehicle handling and could contribute to a vehicle crash. DEFECT REMEDY The repair will involve replacement of the hex flange lock nuts on the affected joints on your vehicle. Dealers have parts and instructions to repair your vehicle. The repair will be performed free of charge and take approximately 45 minutes to 1 hour 45 minutes 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 [Ra]&O~l]g[ID JAN 2 0 2023 . Ct? /’1 j) L//f A/ C” By . …… ………. ….. . JANUARY 2023 11/23/2021 thru 01/30/2023. 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:f/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

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

OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-870 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : NOV 23, 2022 NHTSA Recall No. : 22V-870 Manufacturer Recall No. : 22525 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 5,645 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models built with non-conforming hex flange lock nuts that did not fail at time of vehicle assembly. • The inclusive dates of manufacture were determined by when Navistar began use of non-conforming hex flange lock nuts and when the issue was corrected in production. • The vehicles in the suspect population were built with non-conforming hex flange lock nuts and all other similar vehicles not in the suspect population were built with conforming hex flange lock nuts. There are 5,404 CE school buses in the suspect population Production Dates : FEB 01, 2022 – AUG 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-870 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 2 : 2023-2023 IC EV Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : • The suspect population is identified by models built with non-conforming hex flange lock nuts that did not fail at time of vehicle assembly. • The inclusive dates of manufacture were determined by when Navistar began use of non-conforming hex flange lock nuts and when the issue was corrected in production. • The vehicles in the suspect population were built with non-conforming hex flange lock nuts and all other similar vehicles not in the suspect population were built with conforming hex flange lock nuts. There are 91 EV school buses in the suspect population Production Dates : FEB 08, 2022 – AUG 16, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2023-2023 IC RE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by models built with non-conforming hex flange lock nuts that did not fail at time of vehicle assembly. • The inclusive dates of manufacture were determined by when Navistar began use of non-conforming hex flange lock nuts and when the issue was corrected in production. • The vehicles in the suspect population were built with non-conforming hex flange lock nuts and all other similar vehicles not in the suspect population were built with conforming hex flange lock nuts. There are 150 RE school buses in the suspect population Production Dates : FEB 25, 2022 – AUG 15, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-870 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : • A specific hex flange lock nut (P/N 416743C2) was not properly formed and heat treated to Navistar specification. This lock nut is used in several joint locations on a chassis: o pitman arm pinch bolt joints o steering gear mounting joints o front axle U-bolt joints o front and rear spring eyes o certain rear spring tie • All vehicles contain at least one suspect bolted joint, but due to vehicle configuration, not all vehicles will require all joints to be repaired. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Improperly manufactured nuts that did not immediately fail during vehicle assembly can result in a loss of joint tension as the vehicle ages. This nut is used mainly in suspension (front/rear) and steering gear joints. Loss of tension in these joints may affect vehicle handling which could contribute to a vehicle crash. Description of the Cause : A tier 3 supplier was found to not have adequate heat treat furnace controls to ensure consistent nut surface hardness. In addition, this supplier’s tooling was found to be worn, contributing to mis-formed threads. Identification of Any Warning that can Occur : A general ‘loose’ feeling when driving. Involved Components : Component Name 1 : 3/4″ – 16 hex flange lock nut Component Description : Hex flange lock nut Component Part Number : International P/N 416743C2 Supplier Identification : Component Manufacturer Name : Facil NA Address : 2242 Pinnacle Pkwy #100 Twinsburg Ohio 44087 Country : United States Part 573 Safety Recall Report 22V-870 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Chronology : • 08/16/2022 – Navistar Supplier Quality communicates the concerns of certain hex flange lock nuts stripping at time of vehicle assembly. • 08/26/2022 – Navistar quarantines all vehicles at all assembly plants. • 09/14/2022 – Navistar Supplier Quality and Compliance meet with Engineering to discuss the issue and Engineering initiates investigation to determine full use of certain hex flange lock nuts. • 09/22/2022 through 11/02/2022 – Navistar performs multiple tests to certain hex flange lock nuts returned to Navistar. • 11/04/2022 – Navistar initiates risk assessment on over 300 features. • 11/16/2022 – Navistar completes its risk assessment and determines the impact to all International and IC Bus vehicles • 11/17/2022 – Navistar finalizes the suspect population. • 11/18/2022 – Navistar declares a Safety Recall. As of this time no warranty claims or field failures have occurred in the suspect population. Description of Remedy : Description of Remedy Program : • The remedy will involve replacing all suspect hex flange lock nuts with hex flange lock nuts made to their design specifications. • 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 hex flange lock nuts are made to the specified form and surface hardness where the recalled hex flange lock nuts were not. Identify How/When Recall Condition was Corrected in Production : 08/26/2022 – Navistar quarantines all vehicles at all plants and begins use of hex flange lock nuts manufactured to their specified design values. Recall Schedule : Description of Recall Schedule : It is estimated that the Customer and Dealer notification letters will be mailed by 01/20/2023. Planned Dealer Notification Date : JAN 20, 2023 – JAN 20, 2023 Planned Owner Notification Date : JAN 20, 2023 – JAN 20, 2023 * NR – Not Reported

SEOCONTENT-END