22526 Fuel Vapor Line Without Heat Shielding Installed – 2023 IC Bus CE

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-872 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-872 Manufacturer Recall No. : 22526 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 196 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : GAS Descriptive Information : • The suspect population is identified by models equipped with feature code 12DLP (Gasoline engine). • The inclusive dates of manufacture were determined when Navistar began use of non-shielded fuel vapor recovery lines until the date the issue was contained at the assembly plant. • The vehicles in the suspect population were built with non-shielded fuel vapor recovery lines and all similar vehicles not subject to this recall were built with shielded fuel vapor recovery lines. There are 196 gas powered CE school buses in the suspect population Production Dates : JUN 21, 2022 – SEP 08, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The fuel vapor line may have been built without the heat shield installed and exposure to exhaust system heat in certain areas over time can cause the line to break down and leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A fuel vapor line that breaks down and leaks can increase the risk of a vehicle fire resulting in property damage. Description of the Cause : The fuel vapor line supplier omitted the heat shield tubing. Part 573 Safety Recall Report 22V-872 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : None Involved Components : Component Name 1 : Fuel vapor line with shielding Component Description : Hose, fuel vapor Component Part Number : Kongsberg P/N WH00A83150 Supplier Identification : Component Manufacturer Name : Kongsberg Address : AV Sanden #1155 Ramos Arizpe Coahuila Foreign States 25905 Country : Mexico Chronology : • 09/16/2022 – Navistar Supplier Quality send communication to Compliance describing the issue with the fuel vapor line. • 09/21/2022 – Navistar quarantines gas powered buses at the assembly plant. • 10/04/2022 – Navistar Supplier Quality, Compliance, and Aftersales meet and initiates investigation to the impact to IC gas powered buses. • 10/10/2022 – Navistar Engineering initiates investigation to determine long term affects of continued heat exposure to non-shielded fuel vapor hose. • 11/14/2022 – Navistar Engineering concludes analysis and shares data with Compliance. • 11/16/2022 – Navistar finalizes the suspect population. • 11/18/2022 – Navistar declares a Safety Recall. As of this time, no warranty claims or field failures for this defect have occurred. Part 573 Safety Recall Report 22V-872 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : • The remedy involves removing the fuel vapor line and installing the heat shield tubing that was omitted by the supplier. • 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 adds the heat shield to the existing assembly that was omitted by the supplier. Identify How/When Recall Condition was Corrected in Production : 09/21/2022 – Navistar manufacturing contained the issue and began use of heat shielded fuel vapor lines. 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

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@[KQ □@□ JAN 2 0 2023 ERV/CE PROCEDURE Compliance Dept SUBJECT: SAFETY RECALL 22526 JANUARY 2023 Fuel Vapor Hose on certain IC Bus® CE Series school bus models built 06/21/2022 thru 09/08/2022 with feature code 12DLP (ENGINE, GASOLINE) DEFECT DESCRIPTION Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION A fuel vapor line may have been built without the heat shield installed. Exposure to exhaust system temperatures in certain areas over time can cause the line to break down and possibly leak. A fuel vapor line that breaks down and leaks can increase the risk of a vehicle fire resulting in property damage. MODELS INVOLVED This safety recall involves certain 2023 IC Buse CE Series school bus models built 06/21/2022 thru 09/08/2022 with feature code 12DLP (ENGINE, GASOLINE). ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal”” with safety recall 22526. Also complete any other open campaigns listed on the Service Portal at this time. PARTS INFORMATION NOTE: The fuel vapor hose heat shield will be shipped directly to dealers. Part Number Part Description Quantity 306132C1 STRAP, CABLE LOCK 14 in (355 mm) As Needed VEHICLE RECALL 22526 @ 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, always wear safe eye protection when performing vehicle maintenance. WARNING! To prevent personal injury and / or death, or damage to property, allow engine/ vehicle components to cool before servicing. 1. Park vehicle on flat surface. 2. Shift transmission to Park or Neutral and set parking brake. 3. Turn ignition to Key OFF position. 4. Install wheel chocks. VEHICLE RECALL 22526 ~ 2023 Navistar, Inc. All rights reserved. AU marks are trademarks of their respective owners. 2 2 ~ FWD 000041e705 Figure 1. Fuel Vapor Hose 1. Cable strap (3) 2. Fuelvaporhose NOTE: There will be more cable straps on the vehicle you are working on than what are shown in Figure 1, Item 1. 5. Remove cable straps (Figure 1, Item 1) that route and secure fuel hoses. 6. Wrap fuel line heat shield around fuel vapor hose (Figure 1, Item 2). 7. Secure shield and hoses in place with new cable straps. 8. Remove wheel chocks. END OF SERVICE PROCEDURE VEHICLE RECALL 22526 @ 2023 Navistar. Inc. All rights reserved. All marks are trademarks of their respective owners. 3 LABOR INFORMATION Operation Number Description A40-22526-1 Install Heat Shield Wrap 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 0.9 hrs COMPLETED Service Location Code# Warranty claim expense is to be charged to Warranty. Claims are to be submitted in the normal manner, making reference to Safety Recall 22526 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, a barrel of oil, or a tube of silicone) should be prorated for the cost of the individual pieces / amount used during each repair. VEHICLE RECALL 22526 C 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 – fY’/ TYPE PART — En PAD – Enter 1>0 ter P for type part causing failure. — VEHICLE RECALL 22526 I ~ – NOUN C WARR. TP PAD I I I I -‘ttO © 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 22526 @ 2023 Navlstar, Inc. All rights reserved. All 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 22526 @ 2023 Navistar. Inc. All rights reserved. All marks are trademarks of their respective owners. 7

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A M.IWSl.lR COMPANY IC Bus, LLC 2701 Navistar Drive Lisle, IL 60532 USA navistar.com IMPORTANT SAFETY RECALL 22526 NHTSA RECALL NO. 22V-872 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 school bus models built 06/21/2022 thru 09/08/2022 with feature code 12DLP (Gasoline engine). REASON FOR THIS RECALL A fuel vapor line may have been built without the heat shield installed. Exposure to exhaust system temperatures in certain areas, over time, can cause the line to break down and possibly leak. RISK TO MOTOR VEHICLE SAFETY A fuel vapor line that breaks down and leaks can increase the risk of a vehicle fire resulting in property damage. DEFECT REMEDY The repair will involve installation of the fuel vapor hose heatshield. Dealers have parts and instructions to repair your vehicle. The repair will be performed free of charge and take approximately 60 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 11/23/2021 thru 01/30/2022. Present your original repair [Ra]£0Cl=i[§@ JAN 2 0 2023 By: ~~1t~e.1.~~.’!:: JANUARY 2023 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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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-872 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : DEC 19, 2022 NHTSA Recall No. : 22V-872 Manufacturer Recall No. : 22526 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 196 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : GAS Descriptive Information : • The suspect population is identified by models equipped with feature code 12DLP (Gasoline engine). • The inclusive dates of manufacture were determined when Navistar began use of non-shielded fuel vapor recovery lines until the date the issue was contained at the assembly plant. • The vehicles in the suspect population were built with non-shielded fuel vapor recovery lines and all similar vehicles not subject to this recall were built with shielded fuel vapor recovery lines. There are 196 gas powered CE school buses in the suspect population Production Dates : JUN 21, 2022 – SEP 08, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The fuel vapor line may have been built without the heat shield installed and exposure to exhaust system heat in certain areas over time can cause the line to break down and leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A fuel vapor line that breaks down and leaks can increase the risk of a vehicle fire resulting in property damage. Description of the Cause : The fuel vapor line supplier omitted the heat shield tubing. Part 573 Safety Recall Report 22V-872 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : None Involved Components : Component Name 1 : Fuel vapor line with shielding Component Description : Hose, fuel vapor Component Part Number : Kongsberg P/N WH00A83150 Supplier Identification : Component Manufacturer Name : Kongsberg Address : AV Sanden #1155 Ramos Arizpe Coahuila Foreign States 25905 Country : Mexico Chronology : • 09/16/2022 – Navistar Supplier Quality send communication to Compliance describing the issue with the fuel vapor line. • 09/21/2022 – Navistar quarantines gas powered buses at the assembly plant. • 10/04/2022 – Navistar Supplier Quality, Compliance, and Aftersales meet and initiates investigation to the impact to IC gas powered buses. • 10/10/2022 – Navistar Engineering initiates investigation to determine long term affects of continued heat exposure to non-shielded fuel vapor hose. • 11/14/2022 – Navistar Engineering concludes analysis and shares data with Compliance. • 11/16/2022 – Navistar finalizes the suspect population. • 11/18/2022 – Navistar declares a Safety Recall. As of this time, no warranty claims or field failures for this defect have occurred. Part 573 Safety Recall Report 22V-872 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : • The remedy involves removing the fuel vapor line and installing the heat shield tubing that was omitted by the supplier. • 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 adds the heat shield to the existing assembly that was omitted by the supplier. Identify How/When Recall Condition was Corrected in Production : 09/21/2022 – Navistar manufacturing contained the issue and began use of heat shielded fuel vapor lines. 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

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-872 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : DEC 19, 2022 NHTSA Recall No. : 22V-872 Manufacturer Recall No. : 22526 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 196 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : GAS Descriptive Information : • The suspect population is identified by models equipped with feature code 12DLP (Gasoline engine). • The inclusive dates of manufacture were determined when Navistar began use of non-shielded fuel vapor recovery lines until the date the issue was contained at the assembly plant. • The vehicles in the suspect population were built with non-shielded fuel vapor recovery lines and all similar vehicles not subject to this recall were built with shielded fuel vapor recovery lines. There are 196 gas powered CE school buses in the suspect population Production Dates : JUN 21, 2022 – SEP 08, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The fuel vapor line may have been built without the heat shield installed and exposure to exhaust system heat in certain areas over time can cause the line to break down and leak. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A fuel vapor line that breaks down and leaks can increase the risk of a vehicle fire resulting in property damage. Description of the Cause : The fuel vapor line supplier omitted the heat shield tubing. Part 573 Safety Recall Report 22V-872 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : None Involved Components : Component Name 1 : Fuel vapor line with shielding Component Description : Hose, fuel vapor Component Part Number : Kongsberg P/N WH00A83150 Supplier Identification : Component Manufacturer Name : Kongsberg Address : AV Sanden #1155 Ramos Arizpe Coahuila Foreign States 25905 Country : Mexico Chronology : • 09/16/2022 – Navistar Supplier Quality send communication to Compliance describing the issue with the fuel vapor line. • 09/21/2022 – Navistar quarantines gas powered buses at the assembly plant. • 10/04/2022 – Navistar Supplier Quality, Compliance, and Aftersales meet and initiates investigation to the impact to IC gas powered buses. • 10/10/2022 – Navistar Engineering initiates investigation to determine long term affects of continued heat exposure to non-shielded fuel vapor hose. • 11/14/2022 – Navistar Engineering concludes analysis and shares data with Compliance. • 11/16/2022 – Navistar finalizes the suspect population. • 11/18/2022 – Navistar declares a Safety Recall. As of this time, no warranty claims or field failures for this defect have occurred. • 12/14/2022 – Navistar Compliance documents the field inspections found all rear wheel hub nuts were properly installed or have been repaired. Part 573 Safety Recall Report 22V-872 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : • The remedy involves removing the fuel vapor line and installing the heat shield tubing that was omitted by the supplier. • 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 adds the heat shield to the existing assembly that was omitted by the supplier. Identify How/When Recall Condition was Corrected in Production : 09/21/2022 – Navistar manufacturing contained the issue and began use of heat shielded fuel vapor lines. Recall Schedule : Description of Recall Schedule : Because the recall remedy has been performed while all units were located at dealers, body builders, or logistic providers, there will be no recall schedule. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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