22511 – Steering Wheel May Detach – 2022-2023 IC CE, IC RE, & 2023 IC EV School Buses

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SERVICE PROCEDURE SUBJECT: SAFETY RECALL 22511 MAY, 2022 STEERING WHEEL on certain CE, RE, and EV School bus models built 11/01/2021 thru 05/17/2022 CUSTOMER LETTER Print ready (PDF file) copy of the Customer Letter DEFECT DESCRIPTION The steering wheel retaining nut may not have been torqued properly during assembly and may allow the steering wheel to loosen, and possibly separate from the steering column shaft. A steering wheel that separates from the steering column shaft can increase the risk of a vehicle crash. MODELS INVOLVED This safety recall involves certain IC Bus® Series CE, RE, and EV School bus models built 11/01/2021 thru 05/17/2022. ELIGIBILITY This procedure applies ONLY to vehicles marked in the International® Service Portal5M with Safety Recall 22511. Also complete any other open campaigns listed on the Service Portal at this time. PARTS INFORMATION NOTE: Only Loctite 262 shall be used for this repair. Part Number Part Description Quantity Loctite 262 High Strength Thread Locker 1 Source Local VEHICLE RECALL 22511 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1 SERVICE PROCEDURE 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, 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. Remove horn pad from steering wheel and disconnect electrical connectors. NOTE: Save steering wheel retaining nut for reuse. 6. Remove steering wheel retaining nut. 7. Apply Loctite 262 to retaining nut threads on steering column shaft. 8. Install steering wheel retaining nut and hand tighten. 9. Using a torque wrench, tighten steering wheel retaining nut to 55 – 60 lb-ft (74.5 – 81.3 N.m). 10. Reconnect horn pad electrical connectors and reinstall horn pad. 11 . Remove wheel chocks. END OF SERVICE PROCEDURE VEHICLE RECALL 22511 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2 LABOR INFORMATION Operation Number Description A40-22511-1 R&R Steering Wheel Retaining Nut 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 0.4 hr 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 22511. 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 22511 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3 GROUP GROUP – Enter n umber 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 PAD – Enter 1)() ter P for type part causing failure. :::: -~ UNITED STATES AND POSSESSIONS NOUN C WARR. TP PAD I I I I 0000047910 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, VEHICLE RECALL 22511 © 2022 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 4 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. NAVISTAR, INC. VEHICLE RECALL 22511 © 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 22511 NHTSA RECALL NO. 22V-367 This notice applies to your vehicle identified on the enclosed card. MAY 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 and RE school bus models and 2023 EV school buses built 11/01/2021 thru 5/17/2022. REASON FOR THIS RECALL The steering wheel retaining nut may not have been torqued properly during assembly and may allow the steering wheel to loosen, and possibly separate from the steering column shaft. RISK TO MOTOR VEHICLE SAFETY A steering wheel that separates from the steering column shaft can increase the risk of a vehicle crash. DEFECT REMEDY The repair will involve removal of the steering wheel nut, addition of thread locker, and reinstalling the nut to its correct torque value. Dealers have parts 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 park this vehicle immediately until you can schedule an appointment with any IC Bus dealer to have your vehicle repaired. You can find your nearest dealer by calling 1-800-448-7825 or by using the dealer locator at http://www.icbus.com. 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 5/26/2021 thru 6/9/2022. 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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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-367 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : JUN 08, 2022 NHTSA Recall No. : 22V-367 Manufacturer Recall No. : 22511 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 4,970 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2022-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 4,902 CE school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 IC EV bus Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 68 EV school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-367 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : The steering wheel retaining nut may not have been torqued properly during assembly which may allow the steering wheel to loosen, and possibly separate from the steering column shaft. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A steering wheel that loosens or separates from the steering column shaft can increase the risk of a vehicle crash. Description of the Cause : The cause of the defect is unknown at this time. This report will be updated with the results of the investigation. Identification of Any Warning that can Occur : A rattle may be heard under the horn pad and the steering wheel may feel loose to the operator. Involved Components : Component Name 1 : Steering wheel retaining nut Component Description : Nut Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : • 05/03/2022 – Navistar Field Service receives communication from a school district that one of their school buses experienced steering wheel separation while the bus was in operation. No students were on the bus at the time of the incident. • 05/04/2022 Navistar Quality audits warranty history for this bus. No warranty history reported for loose steering wheel. • 05/06/2022 – Navistar Manufacturing reviews and verifies DC tools are within torque specification and no other issues found. • 05/12/2022 – Navistar Quality reports the steering wheel separation to Compliance. Part 573 Safety Recall Report 22V-367 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 • 05/13/2002 – Navistar Field Service receives communication from a dealer of a second school bus experiencing a loose steering wheel that separated during pre-delivery inspection. The bus was not in operation at the time of the incident. • 05/17/2022 – Navistar Manufacturing quarantines all buses at the assembly plant. • 05/19/2022 – Navistar declares a Safety Recall. • 06/03/2022 – Navistar determines no defect exists in the RE bus because this model uses a different steering column and steering wheel retainer and does not require the remedy repair. • 06/07/2022 – Navistar removes the RE bus from the recall population. • 06/09/2022 – Navistar mails cancelation notices to affected RE bus customers. Description of Remedy : Description of Remedy Program : • Owners of affected vehicles will be asked to park them until they can be repaired by their local dealer. The remedy will involve removal of the steering wheel nut, addition of thread locker, and reinstalling the nut to its correct torque value. • 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 assembly adds thread locker to the steering column shaft threads. Identify How/When Recall Condition was Corrected in Production : 05/17/2022 – Navistar Manufacturing adds torque validation of steering wheel nut, witness mark, and thread locker to steering wheel installation process. Recall Schedule : Description of Recall Schedule : • Dealers were asked to notify their customers as soon as possible to begin repairing vehicles on 5/20/2022. They were provided with a version of the standard customer letter for distribution if necessary. It is estimated that the NHTSA approved customer notification letter will be mailed by 05/27/2022. • The dealer notification letter was released to dealers on 05/20/2022. Planned Dealer Notification Date : MAY 23, 2022 – MAY 23, 2022 Planned Owner Notification Date : MAY 23, 2022 – MAY 27, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-367 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : AUG 05, 2022 NHTSA Recall No. : 22V-367 Manufacturer Recall No. : 22511 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 4,970 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2023-2023 IC EV bus Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 68 EV school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 4,902 CE school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-367 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : The steering wheel hub, which helps the steering wheel grip the steering column shaft, may not be machined correctly. This can allow the steering wheel retaining nut to lose its clamping force, which may allow the steering wheel to loosen, and possibly separate from the steering column shaft. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A steering wheel that loosens or separates from the steering column shaft can increase the risk of a vehicle crash. Description of the Cause : The steering wheel hub taper ratio and depth did not meet design specifications. Identification of Any Warning that can Occur : A rattle may be heard under the horn pad and the steering wheel may feel loose to the operator. Involved Components : Component Name 1 : Steering wheel retaining nut Component Description : Nut Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : • 05/03/2022 – Navistar Field Service receives communication from a school district that one of their school buses experienced steering wheel separation while the bus was in operation. No students were on the bus at the time of the incident. • 05/04/2022 Navistar Quality audits warranty history for this bus. No warranty history reported for loose steering wheel. • 05/06/2022 – Navistar Manufacturing reviews and verifies DC tools are within torque specification and no other issues found. Part 573 Safety Recall Report 22V-367 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 • 05/12/2022 – Navistar Quality reports the steering wheel separation to Compliance. • 05/13/2002 – Navistar Field Service receives communication from a dealer of a second school bus experiencing a loose steering wheel that separated during pre-delivery inspection. The bus was not in operation at the time of the incident. • 05/17/2022 – Navistar Manufacturing quarantines all buses at the assembly plant. • 05/19/2022 – Navistar declares a Safety Recall. • 06/03/2022 – Navistar determines no defect exists in the RE bus because this model uses a different steering column and steering wheel retainer and does not require the remedy repair. • 06/07/2022 – Navistar removes the RE bus from the recall population. • 06/09/2022 – Navistar mails cancelation notices to affected RE bus customers. Description of Remedy : Description of Remedy Program : • Owners of affected vehicles will be asked to park them until they can be repaired by their local dealer. The remedy will involve removal of the steering wheel nut, addition of thread locker, and reinstalling the nut to its correct torque value. • 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 assembly adds thread locker to the steering column shaft threads. Identify How/When Recall Condition was Corrected in Production : 05/17/2022 – Navistar Manufacturing adds torque validation of steering wheel nut, witness mark, and thread locker to steering wheel installation process. Recall Schedule : Description of Recall Schedule : • Dealers were asked to notify their customers as soon as possible to begin repairing vehicles on 5/20/2022. They were provided with a version of the standard customer letter for distribution if necessary. It is estimated that the NHTSA approved customer notification letter will be mailed by 05/27/2022. • The dealer notification letter was released to dealers on 05/20/2022. Planned Dealer Notification Date : MAY 23, 2022 – MAY 23, 2022 Planned Owner Notification Date : MAY 23, 2022 – MAY 27, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-367 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : SEP 07, 2022 NHTSA Recall No. : 22V-367 Manufacturer Recall No. : 22511 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 4,970 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2022-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 4,902 CE school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 IC EV bus Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 68 EV school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-367 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : The steering wheel hub, which helps the steering wheel grip the steering column shaft, may not be machined correctly. This can allow the steering wheel retaining nut to lose its clamping force, which may allow the steering wheel to loosen, and possibly separate from the steering column shaft. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A steering wheel that loosens or separates from the steering column shaft can increase the risk of a vehicle crash. Description of the Cause : The steering wheel hub taper ratio and depth did not meet design specifications. Identification of Any Warning that can Occur : A rattle may be heard under the horn pad and the steering wheel may feel loose to the operator. Involved Components : Component Name 1 : Steering wheel retaining nut Component Description : Nut Component Part Number : NR Supplier Identification : Component Manufacturer Name : Key Safety Restraint systems, Inc Address : Parque Industrial Valle Hermoso Lotes 4 Valle Hermoso Foreign States 87600 Country : Mexico Chronology : • 05/03/2022 – Navistar Field Service receives communication from a school district that one of their school buses experienced steering wheel separation while the bus was in operation. No students were on the bus at the time of the incident. • 05/04/2022 Navistar Quality audits warranty history for this bus. No warranty history reported for loose steering wheel. • 05/06/2022 – Navistar Manufacturing reviews and verifies DC tools are within torque specification and no other issues found. Part 573 Safety Recall Report 22V-367 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 • 05/12/2022 – Navistar Quality reports the steering wheel separation to Compliance. • 05/13/2002 – Navistar Field Service receives communication from a dealer of a second school bus experiencing a loose steering wheel that separated during pre-delivery inspection. The bus was not in operation at the time of the incident. • 05/17/2022 – Navistar Manufacturing quarantines all buses at the assembly plant. • 05/19/2022 – Navistar declares a Safety Recall. • 06/03/2022 – Navistar determines no defect exists in the RE bus because this model uses a different steering column and steering wheel retainer and does not require the remedy repair. • 06/07/2022 – Navistar removes the RE bus from the recall population. • 06/09/2022 – Navistar mails cancelation notices to affected RE bus customers. Description of Remedy : Description of Remedy Program : • Owners of affected vehicles will be asked to park them until they can be repaired by their local dealer. The remedy will involve removal of the steering wheel nut, addition of thread locker, and reinstalling the nut to its correct torque value. • 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 assembly adds thread locker to the steering column shaft threads. Identify How/When Recall Condition was Corrected in Production : 05/17/2022 – Navistar Manufacturing adds torque validation of steering wheel nut, witness mark, and thread locker to steering wheel installation process. Recall Schedule : Description of Recall Schedule : • Dealers were asked to notify their customers as soon as possible to begin repairing vehicles on 5/20/2022. They were provided with a version of the standard customer letter for distribution if necessary. It is estimated that the NHTSA approved customer notification letter will be mailed by 05/27/2022. • The dealer notification letter was released to dealers on 05/20/2022. Planned Dealer Notification Date : MAY 23, 2022 – MAY 23, 2022 Planned Owner Notification Date : MAY 23, 2022 – MAY 27, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-367 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : JUN 08, 2022 NHTSA Recall No. : 22V-367 Manufacturer Recall No. : 22511 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 4,970 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2022-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 4,902 CE school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 IC EV bus Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 68 EV school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-367 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : The steering wheel retaining nut may not have been torqued properly during assembly which may allow the steering wheel to loosen, and possibly separate from the steering column shaft. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A steering wheel that loosens or separates from the steering column shaft can increase the risk of a vehicle crash. Description of the Cause : The cause of the defect is unknown at this time. This report will be updated with the results of the investigation. Identification of Any Warning that can Occur : A rattle may be heard under the horn pad and the steering wheel may feel loose to the operator. Involved Components : Component Name 1 : Steering wheel retaining nut Component Description : Nut Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : • 05/03/2022 – Navistar Field Service receives communication from a school district that one of their school buses experienced steering wheel separation while the bus was in operation. No students were on the bus at the time of the incident. • 05/04/2022 Navistar Quality audits warranty history for this bus. No warranty history reported for loose steering wheel. • 05/06/2022 – Navistar Manufacturing reviews and verifies DC tools are within torque specification and no other issues found. • 05/12/2022 – Navistar Quality reports the steering wheel separation to Compliance. Part 573 Safety Recall Report 22V-367 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 • 05/13/2002 – Navistar Field Service receives communication from a dealer of a second school bus experiencing a loose steering wheel that separated during pre-delivery inspection. The bus was not in operation at the time of the incident. • 05/17/2022 – Navistar Manufacturing quarantines all buses at the assembly plant. • 05/19/2022 – Navistar declares a Safety Recall. • 06/03/2022 – Navistar determines no defect exists in the RE bus because this model uses a different steering column and steering wheel retainer and does not require the remedy repair. • 06/07/2022 – Navistar removes the RE bus from the recall population. • 06/09/2022 – Navistar mails cancelation notices to affected RE bus customers. Description of Remedy : Description of Remedy Program : • Owners of affected vehicles will be asked to park them until they can be repaired by their local dealer. The remedy will involve removal of the steering wheel nut, addition of thread locker, and reinstalling the nut to its correct torque value. • 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 assembly adds thread locker to the steering column shaft threads. Identify How/When Recall Condition was Corrected in Production : 05/17/2022 – Navistar Manufacturing adds torque validation of steering wheel nut, witness mark, and thread locker to steering wheel installation process. Recall Schedule : Description of Recall Schedule : • Dealers were asked to notify their customers as soon as possible to begin repairing vehicles on 5/20/2022. They were provided with a version of the standard customer letter for distribution if necessary. It is estimated that the NHTSA approved customer notification letter will be mailed by 05/27/2022. • The dealer notification letter was released to dealers on 05/20/2022. Planned Dealer Notification Date : MAY 23, 2022 – MAY 23, 2022 Planned Owner Notification Date : MAY 23, 2022 – MAY 27, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-367 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Navistar, Inc. Submission Date : MAY 23, 2022 NHTSA Recall No. : 22V-367 Manufacturer Recall No. : 22511 Manufacturer Information : Manufacturer Name : Navistar, Inc. Address : 2701 Navistar Drive Lisle IL 60532 Company phone : 331-332-1590 Population : Number of potentially involved : 5,173 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2022-2023 IC CE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 4,902 CE school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2023 IC RE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 203 RE school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-367 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2023-2023 IC EV bus Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : • The suspect population is identified by all bus models built at Navistar’s Tulsa bus plant. The inclusive dates of manufacture were determined by selecting beginning date of one week prior to the build date of the first bus to experience steering wheel separation through the date the plant quarantined all units at the plant. • The vehicles in the suspect population were built within a defined period of time where nuts were found to be under torqued during inspection and all other similar vehicles were built outside of this time period. There are 68 EV school buses in the suspect population. Production Dates : NOV 01, 2021 – MAY 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The steering wheel retaining nut may not have been torqued properly during assembly which may allow the steering wheel to loosen, and possibly separate from the steering column shaft. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : A steering wheel that loosens or separates from the steering column shaft can increase the risk of a vehicle crash. Description of the Cause : The cause of the defect is unknown at this time. This report will be updated with the results of the investigation. Identification of Any Warning that can Occur : A rattle may be heard under the horn pad and the steering wheel may feel loose to the operator. Involved Components : Component Name 1 : Steering wheel retaining nut Component Description : Nut Component Part Number : NR Supplier Identification : Part 573 Safety Recall Report 22V-367 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : • 05/03/2022 – Navistar Field Service receives communication from a school district that one of their school buses experienced steering wheel separation while the bus was in operation. No students were on the bus at the time of the incident. • 05/04/2022 Navistar Quality audits warranty history for this bus. No warranty history reported for loose steering wheel. • 05/06/2022 – Navistar Manufacturing reviews and verifies DC tools are within torque specification and no other issues found. • 05/12/2022 – Navistar Quality reports the steering wheel separation to Compliance. • 05/13/2002 – Navistar Field Service receives communication from a dealer of a second school bus experiencing a loose steering wheel that separated during pre-delivery inspection. The bus was not in operation at the time of the incident. • 05/17/2022 – Navistar Manufacturing quarantines all buses at the assembly plant. • 05/19/2022 – Navistar declares a Safety Recall. Description of Remedy : Description of Remedy Program : • Owners of affected vehicles will be asked to park them until they can be repaired by their local dealer. The remedy will involve removal of the steering wheel nut, addition of thread locker, and reinstalling the nut to its correct torque value. • 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 assembly adds thread locker to the steering column shaft threads. Identify How/When Recall Condition was Corrected in Production : 05/17/2022 – Navistar Manufacturing adds torque validation of steering wheel nut, witness mark, and thread locker to steering wheel installation process. Recall Schedule : Description of Recall Schedule : • Dealers were asked to notify their customers as soon as possible Part 573 Safety Recall Report 22V-367 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 to begin repairing vehicles on 5/20/2022. They were provided with a version of the standard customer letter for distribution if necessary. It is estimated that the NHTSA approved customer notification letter will be mailed by 05/27/2022. • The dealer notification letter was released to dealers on 05/20/2022. Planned Dealer Notification Date : MAY 23, 2022 – MAY 23, 2022 Planned Owner Notification Date : MAY 23, 2022 – MAY 27, 2022 * NR – Not Reported

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