SC0434 – Loss of Power Steering Assist – 2023 Mack LR Battery Electric Trucks

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Date Number Release Page 05.2022 SC0434 01 1(9) Mack LRE Steering Assist LRE RECALL INFORMATION (May 2022) Mack Trucks has determined that certain 2021-2023 model year LRE vehicles could experience an increased torque on the steering wheel due to pressure drop in the power steering system. On affected vehicles there is a potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering which may result in a vehicle crash, property damage and/or personal injury. Mack Trucks has not received any complaints or reports of vehicle crashes because of this safety issue; therefore, Mack considers this as a proactive measure to protect the public and Mack’s customers from the potential risk associated with this defect. To ensure that these vehicles meet Mack’s stringent quality requirements, follow the instructions outlined below to replace the steering gear, pitman arm, steering gear return hose, servo pump’s power cable, and to reprogram the electronic control module. VEHICLES AFFECTED Certain Mack LR Battery Electric Vehicles manufactured between February 20, 2022, and March 07, 2022. VEHICLE QUANTITY There are 37 vehicles affected by this recall. (33 US, 4 CAN) SAFETY RECALL Mack Trucks Inc. Greensboro, NC USA Page 2 of 10 Parts Note: When ordering parts you must request the steering gear, pitman arm, and servo pump power cable by emailing Chris Mann at chris.mann@volvo.com. Chris will then ship these parts directly to your location. All other part listed will need to be ordered through the normal ordering process. Part Number Part Description Quantity 25174675 Steering Gear (Do not order see note above) 1 23118147 Pitman Arm (Do not order see note above) 1 24298026 Servo Pump’s Power Cable (Do not order see note above) 1 20928371 Steering Gear Return Hose (cut to length, 2760mm) 1 25155298 Fitting (90 degree) 1 25106380 Screw 7/16-20 1 25098472 Nut retainer 1 990993 Locking Nut M20 by 20.3 1 992479 Hexagon screw 1 994884 Washer 2 25107354 Hexagon screw 4 25093315 Washer 4 25165443 Hexagon screw 1 990954 Lock nut M16 1 994882 Washer 2 993909 Hexagon screw 1 Repair Instructions Hardware replacement 1. Secure Vehicle for Service. 2. Follow operation 6421-03-02-01 in Impact Steps 1 – 67 for replacement of the steering gear and pitman arm. Changes listed below are needed to adapt new gear box and pitman arm to chassis. a. New Steering Gear has the return port located on the front side of the steering gear. This requires a new 90° fitting (25155298) and a longer return hose requiring a routing change See image 1 below. b. New steering gear also requires a new style pitman arm (23118147), The new pitman arm attaching point is a pitch type instead of a taper fit. See image 2 below. c. When performing steps 55-56, all new mounting hardware is required for the installation of the gear box and a new style pitman arm. Torque all hardware to spec. See image 3 below. Mack Truck Inc. Safety Recall Date 05.2022 Page 3 of 10 Page 4 of 10 Tightening torque Item Description Torque 1 Pitman arm, screw 275 ± 20 Nm (203 ± 15 ft-lb) 2 Steering gear, screw 644 ± 34 Nm (475 ± 25 ft-lb) 3 Pitman arm, screw 450 ± 40 Nm (332 ± 30 ft-lb) 4 Steering gear, screw 427 ± 20 Nm (315 ± 15 ft-lb) 3. Install new steering gear to reservoir return hose (20928371 cut to length, 2760mm), ensure proper routing around steering gear found in image 1 above. Torque both return hose clamps to spec. Mack Truck Inc. Safety Recall Date 05.2022 Page 5 of 10 Tightening torque Steering gear, hose clamp 5 ± 0.5 Nm (4 ± 0.4 ft-lb) NOTE Do not installing any covers and fuses that were removed in Steps 1 – 67 at this time 4. Remove the cover on the Fuse Box (shown below). 5. Remove the retraining nut and positive power steering cable from the fuse box. Page 6 of 10 6. On the power steering pump, remove the two screws and cover to gain access to the power cable terminal. 7. Remove ONLY the positive power cable terminal nut and remove cable. Mack Truck Inc. Safety Recall Date 05.2022 Page 7 of 10 8. Cut all cable ties securing the power cable and remove it from the chassis. 9. Install new power cable (24298026) making sure to route in the same location as the old one. 10. Install cable terminal onto servo pump stud and torque to spec. Tightening torque Servo pump cable (M8) nut 10 ± 3 Nm (7 ± 2 ft-lb) 11. Install cover and screws on servo pump and torque to spec. Tightening torque Servo pump, cover, screws 1 Nm (1 ft-lb) Page 8 of 10 12. Install new power cable terminal in fuse box and torque to spec. Tightening torque Fuse box, cable nut 20 ±3 Nm (15 ±2 ft-lb) NOTE It may be necessary to modify the fuse cover for proper fitment of the new power cable. (See below) 13. Install fuse box cover. Mack Truck Inc. Safety Recall Date 05.2022 Page 9 of 10 14. Follow operation 6421-03-02-01 in Impact Steps 68-121 to complete steering gear replacement and bleed air from system. Software Install: 15. Connect PTT to truck and run operation 1700-22-03-06 using accessory kit Part # 85163833 16. Confirm operation of power steering system. 17. Return vehicle to service. REIMBURSEMENT This repair is covered by an authorized Safety Recall. Reimbursement is obtained through the normal claim handling process. UCHP Reimbursement Claim Type (used only when uploading from the Dealer Business System) 40 Page 10 of 10 Recall Status Vehicle repaired per instructions 1-Modified per instructions Labor Codes 6421-03-02-01 Steering Gear, Replacement 2.5 3714-03-02-16 Power Cable, Power Steering Pump, Replace 0.5 6459-03-02-01 Power Steering Hose, Replacement 0.6 1700-22-03-11 Campaign, Programming 0.3 Causal Part 23056973 Authorization Number C6641 Note: Dealers are to perform Safety Recalls on all subject vehicles at no charge to the vehicle owner regardless of mileage, age of vehicle or ownership (original purchaser or subsequent purchasers). Whenever vehicles are subject to a Safety Recall are brought to your dealership for service, or taken into your dealership vehicle inventory, it is strongly recommended that every effort be made to perform the recall correction before the vehicle is sold or released to the owner.

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SC0434_OWNER_LTR May 2022 DEAR MACK TRUCK OWNER: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Mack Trucks, Inc. has decided that a defect which relates to motor vehicle safety may exist in certain 2021 – 2023 Mack LR Battery Electric Vehicles built February 20, 2020 through March 7, 2022. SAFETY DEFECT: On a small number of LR Electric trucks, a defect in the steering system could cause a loss of power steering assist during strong or fast steering inputs, like in an evasive maneuver. SAFETY RISK: A loss of power steering assist can cause a sudden increase in steering effort and create the risk of a crash. PRECAUTIONS YOU CAN TAKE: TIME REQUIRED FOR THE REPAIR: There are no precautions you can take other than having your vehicle repaired by a Mack Parts and Service Center. The time required to inspect and/or repair your vehicle is approximately 1 hour. WHAT YOU SHOULD DO: You should contact the nearest Mack Parts and Service Center and make an appointment. Mack dealer will replace the higher ratio steering gear and power steering pump software for higher RPM’s on the steering pump.at no cost to you. You can locate the closest Mack Parts and Service Center by going on line to http://www.macktrucks.com/ and selecting “Dealer & Service Locations” or by calling our toll-free number: 1-800-866-1177. IMPORTANT SAFETY RECALL SC0434 NHTSA RECALL # 22V-204 NOTICE REGARDING LEASED VEHICLES: If you are a Lessor of vehicles subject to this Notice, you have an obligation under Federal Law to provide a copy of this Notice to all Lessees within 10 days of your receipt of this Notice. Further, you must maintain a record, which identifies the Lessee(s) to whom you send a copy of this letter, the date you send this letter, and the Vehicle Identification Number(s) of the vehicle(s) that you have leased to that lessee. For purposes of this Notice, the term Lessor means: a person or entity that is the owner, as reflected on the vehicle’s title, of any five or more leased vehicles (as defined in CFR Section 577.4), as of the date of notification by the manufacturer of the existence of a safetyrelated defect or non-compliance with a Federal Motor Vehicle Safety Standard in one or more of the leased motor vehicles. OWNER RECALL RESPONSE CARD: The enclosed “Notice of Vehicle Recall” identifies your vehicle. If you no longer own the vehicle, please help us update our records by completing the “Vehicle Disposition Record” portion of the enclosed postage-free Notice of Mandatory Safety Campaign card and mailing it back to us. ASSISTANCE/ COMPLAINTS: PRE NOTIFICATION REMEDIES: If your vehicle has not been repaired within a reasonable time after delivering it to a Mack Parts and Service Center, please contact: Mack Trucks, Inc. Regulatory Affairs Department, P.O. Box 26115 Greensboro, NC 27402-6115 vtna.regulatoryaffairs@volvo.com You may also submit complaints to the Administrator of the National Highway Traffic Safety Administration (1200 New Jersey Avenue, S.E., Washington DC 20590 or call the toll-free Auto Safety Hot Line at 1-888- 327-4236 (TTY: 1-800-424-9153), or go to http://www.safercar.gov if you believe that Mack has failed to remedy the defect without charge, or has failed to remedy the vehicle within 60 days of the owners first tender to obtain repair following the earliest time that parts are available. If you have previously paid for repairs as a result of this issue, you may be entitled to recovery of those expenses. Submit copies of all documentation supporting your claim according to the rules specified in the “General Plan for Reimbursement of Prenotification Remedies” provided in this mailing. We regret any inconvenience this may cause to your operation, but hope you will appreciate our sincere efforts to demonstrate Mack’s commitment to provide our customers with the best possible product. MACK TRUCKS, INC.

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MACK TRUCKS RECALL ALERT © Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document. Description The steering system loses pressure and causes increased torque on the steering wheel. This results in a potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering which may result in a vehicle crash, property damage and/or personal injury. The remedy is still under developement. Model and Model Years Affected • Certain 2023 Mack LR Battery Electric Vehicles built January 1, 2022 through March 29, 2022. Vehicle Quantities • 37 (33 US, 4 CAN) Dealer Responsibilities • The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act require dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer. • Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer. Notification Release Schedule • Vehicle list will be posted on the Trucks Dealer Portal on April 1, 2022 • Owner notification letters will be released on or before May 28, 2022 Contact If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com. Subject: Safety Recall SC434, Mack LRe Steering Assist Recall Number: SRA-M434 Date: April 1, 2022 Applicable Markets: ☒U.S. ☒Canada ☐ Export

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MACK TRUCKS RECALL ALERT © Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document. Description The steering system loses pressure and causes increased torque on the steering wheel. This results in a potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering which may result in a vehicle crash, property damage and/or personal injury. The remedy is still under developement. Model and Model Years Affected • Certain 2021-2023 Mack LR Battery Electric Vehicles built February 20, 2020 through March 7, 2022. Vehicle Quantities • 37 (33 US, 4 CAN) Dealer Responsibilities • The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act require dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer. • Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer. Notification Release Schedule • Vehicle list will be posted on the Trucks Dealer Portal on April 1, 2022 • Owner notification letters will be released on or before May 28, 2022 Contact If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com. Subject: Safety Recall SC434, Mack LRe Steering Assist rev 5/10/2022 Recall Number: SRA-M434 Date: April 1, 2022 Applicable Markets: ☒U.S. ☒Canada ☐ Export

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-204 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : MAR 29, 2022 NHTSA Recall No. : 22V-204 Manufacturer Recall No. : SC0434 Manufacturer Information : Manufacturer Name : Mack Trucks, Inc. Address : 2100 Mack Boulevard PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131 Population : Number of potentially involved : 33 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 MACK LR BATTERY ELECTRIC VEHICLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Engineering testing has shown a deviation from the internal acceptable standard allowance for hydraulic assist during evasive maneuvering. The power steering assist system loses pressure during aggressive maneuvering and causes increased torque on the steering wheel. The safety defect affects Mack LR model BEV (battery electric vehicles) – 37 total (33 in the US, 4 in Canada). Production Dates : JAN 01, 2022 – MAR 29, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The steering system loses pressure and causes increased torque on the steering wheel. Engineering tested an 18.9 ratio gear single pump and determined the outcome to not be acceptable per the internal standard. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-204 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : March 21, 2022: Issued raised to Product Safety Working Group from Engineering, March 23, 2022: Issue approved for recommendation to Product Safety Group, March 24, 2022: Product Safety Committee approves recall decision, March 29, 2022: Internal notifications sent and 573 report filed with NHTSA. Description of Remedy : Description of Remedy Program : NR How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR Recall Schedule : Description of Recall Schedule : March 29, 2022: Notify Sales and Service and other internal stakeholders April 1, 2022: Notify Dealers and post VIN list, dealer alert to Trucks Dealer Portal By May 30, 2022: Notify owners of affected trucks Planned Dealer Notification Date : APR 01, 2022 – APR 01, 2022 Planned Owner Notification Date : MAY 30, 2022 – MAY 30, 2022 Part 573 Safety Recall Report 22V-204 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-204 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : MAY 25, 2022 NHTSA Recall No. : 22V-204 Manufacturer Recall No. : SC0434 Manufacturer Information : Manufacturer Name : Mack Trucks, Inc. Address : 2100 Mack Boulevard PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131 Population : Number of potentially involved : 33 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2021-2023 MACK LR BATTERY ELECTRIC VEHICLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Engineering testing has shown a deviation from the internal acceptable standard allowance for hydraulic assist during evasive maneuvering. The power steering assist system loses pressure during aggressive maneuvering and causes increased torque on the steering wheel. The safety defect affects Mack LR model BEV (battery electric vehicles) – 37 total (33 in the US, 4 in Canada). Production Dates : FEB 20, 2020 – MAR 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The steering system loses pressure and causes increased torque on the steering wheel. Engineering tested an 18.9 ratio gear single pump and determined the outcome to not be acceptable per the internal standard. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering. The risk is a potential vehicle crash. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-204 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Steering Hydraulic Assist System Component Description : Steering gear and power steering pump software Component Part Number : This is not a component problem it is a systems issue. Component Name 2 : This is not a component problem it is a system Component Description : This is not a component problem it is a systems issue. Component Part Number : This is not a component problem it is a systems issue. Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : March 21, 2022: Issued raised to Product Safety Working Group from Engineering, March 23, 2022: Issue approved for recommendation to Product Safety Group, March 24, 2022: Product Safety Committee approves recall decision, March 29, 2022: Internal notifications sent and 573 report filed with NHTSA. THERE HAVE BEEN NO WARRANTY CLAIMS, FIELD OR SERVICE REPORTS RELATED TO THIS ISSUE. Description of Remedy : Description of Remedy Program : VEHICLES WILL HAVE A HIGHER RATIO STEERING GEAR INSTALLED AND NEW SOFTWARE FOR THE POWER STEERING PUMP. VEHICLES ARE BRAND NEW AND UNDER WARRANTY ANY PRE-NOTIFICATION REMEDIES PERFORMED OUTSIDE DEALER NETWORK ARE COVERED UNDER MACK’S PRE-NOTIFICATION REMEDY PROGRAM. How Remedy Component Differs from Recalled Component : Higher Ratio Steering gear and new power steering pump software for higher RPM’s on the steering pump. Identify How/When Recall Condition was Corrected in Production : Stop Shipment at factory March 29, 2022. Vehicles are on hold pending remedy correction in production. Part 573 Safety Recall Report 22V-204 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : March 29, 2022: Notify Sales and Service and other internal stakeholders April 1, 2022: Notify Dealers and post VIN list, dealer alert to Trucks Dealer Portal By May 30, 2022: Notify owners of affected trucks Planned Dealer Notification Date : APR 01, 2022 – APR 01, 2022 Planned Owner Notification Date : MAY 30, 2022 – MAY 30, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-204 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : MAY 25, 2022 NHTSA Recall No. : 22V-204 Manufacturer Recall No. : SC0434 Manufacturer Information : Manufacturer Name : Mack Trucks, Inc. Address : 2100 Mack Boulevard PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131 Population : Number of potentially involved : 33 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2021-2023 MACK LR BATTERY ELECTRIC VEHICLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Engineering testing has shown a deviation from the internal acceptable standard allowance for hydraulic assist during evasive maneuvering. The power steering assist system loses pressure during aggressive maneuvering and causes increased torque on the steering wheel. The safety defect affects Mack LR model BEV (battery electric vehicles) – 37 total (33 in the US, 4 in Canada). Production Dates : FEB 20, 2020 – MAR 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The steering system loses pressure and causes increased torque on the steering wheel. Engineering tested an 18.9 ratio gear single pump and determined the outcome to not be acceptable per the internal standard. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering. The risk is a potential vehicle crash. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-204 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Steering Hydraulic Assist System Component Description : Steering gear and power steering pump software Component Part Number : This is not a component problem it is a systems issue. Component Name 2 : This is not a component problem it is a systems is Component Description : This is not a component problem it is a systems issue. Component Part Number : This is not a component problem it is a systems issue. Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : March 21, 2022: Issued raised to Product Safety Working Group from Engineering, March 23, 2022: Issue approved for recommendation to Product Safety Group, March 24, 2022: Product Safety Committee approves recall decision, March 29, 2022: Internal notifications sent and 573 report filed with NHTSA. THERE HAVE BEEN NO WARRANTY CLAIMS, FIELD OR SERVICE REPORTS RELATED TO THIS ISSUE. Description of Remedy : Description of Remedy Program : VEHICLES WILL HAVE A HIGHER RATIO STEERING GEAR INSTALLEDAND NEW SOFTWARE FOR THE POWER STEERING PUMP. VEHICLES ARE BRAND NEW AND UNDER WARRANTY ANY PRE-NOTIFICATION REMEDIES PERFORMED OUTSIDE DEALER NETWORK ARE COVERED UNDER MACK’S PRE-NOTIFICATION REMEDY PROGRAM. How Remedy Component Differs from Recalled Component : Higher Ratio Steering gear and new power steering pump software for higher RPM’s on the steering pump. Identify How/When Recall Condition was Corrected in Production : Stop Shipment at factory March 29, 2022. Vehicles are on hold pending remedy correction in production. Part 573 Safety Recall Report 22V-204 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : March 29, 2022: Notify Sales and Service and other internal stakeholders April 1, 2022: Notify Dealers and post VIN list, dealer alert to Trucks Dealer Portal By May 30, 2022: Notify owners of affected trucks Planned Dealer Notification Date : APR 01, 2022 – APR 01, 2022 Planned Owner Notification Date : MAY 30, 2022 – MAY 30, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-204 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : APR 11, 2022 NHTSA Recall No. : 22V-204 Manufacturer Recall No. : SC0434 Manufacturer Information : Manufacturer Name : Mack Trucks, Inc. Address : 2100 Mack Boulevard PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131 Population : Number of potentially involved : 33 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 MACK LR BATTERY ELECTRIC VEHICLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Engineering testing has shown a deviation from the internal acceptable standard allowance for hydraulic assist during evasive maneuvering. The power steering assist system loses pressure during aggressive maneuvering and causes increased torque on the steering wheel. The safety defect affects Mack LR model BEV (battery electric vehicles) – 37 total (33 in the US, 4 in Canada). Production Dates : JAN 01, 2022 – MAR 29, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The steering system loses pressure and causes increased torque on the steering wheel. Engineering tested an 18.9 ratio gear single pump and determined the outcome to not be acceptable per the internal standard. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering. The risk is a potential vehicle crash. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-204 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Steering Hydraulic Assist System Component Description : Steering gear and power steering pump software Component Part Number : This is not a component problem it is a systems issue. Component Name 2 : This is not a component problem it is a systems is Component Description : This is not a component problem it is a systems issue. Component Part Number : This is not a component problem it is a systems issue. Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : March 21, 2022: Issued raised to Product Safety Working Group from Engineering, March 23, 2022: Issue approved for recommendation to Product Safety Group, March 24, 2022: Product Safety Committee approves recall decision, March 29, 2022: Internal notifications sent and 573 report filed with NHTSA. Description of Remedy : Description of Remedy Program : VEHICLES ARE BRAND NEW AND UNDER WARRANTY ANY PRENOTIFICATION REMEDIES PERFORMED OUTSIDE DEALER NETWORK ARE COVERED UNDER MACK’S PRE-NOTIFICATION REMEDY PROGRAM. How Remedy Component Differs from Recalled Component : Higher Ratio Steering gear and power steering pump software for higher RPM’s on the steering pump. Identify How/When Recall Condition was Corrected in Production : Stop Shipment at factory March 29, 2022. Vehicles are on hold pending remedy correction in production. Recall Schedule : Part 573 Safety Recall Report 22V-204 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : March 29, 2022: Notify Sales and Service and other internal stakeholders April 1, 2022: Notify Dealers and post VIN list, dealer alert to Trucks Dealer Portal By May 30, 2022: Notify owners of affected trucks Planned Dealer Notification Date : APR 01, 2022 – APR 01, 2022 Planned Owner Notification Date : MAY 30, 2022 – MAY 30, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-204 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : MAY 10, 2022 NHTSA Recall No. : 22V-204 Manufacturer Recall No. : SC0434 Manufacturer Information : Manufacturer Name : Mack Trucks, Inc. Address : 2100 Mack Boulevard PO Box M Allentown PA 18105-5000 Company phone : 610-709-2131 Population : Number of potentially involved : 33 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2021-2023 MACK LR BATTERY ELECTRIC VEHICLE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Engineering testing has shown a deviation from the internal acceptable standard allowance for hydraulic assist during evasive maneuvering. The power steering assist system loses pressure during aggressive maneuvering and causes increased torque on the steering wheel. The safety defect affects Mack LR model BEV (battery electric vehicles) – 37 total (33 in the US, 4 in Canada). Production Dates : FEB 20, 2020 – MAR 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The steering system loses pressure and causes increased torque on the steering wheel. Engineering tested an 18.9 ratio gear single pump and determined the outcome to not be acceptable per the internal standard. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Potential for the driver to lose hydraulic assist during strong steering/evasive maneuvering. The risk is a potential vehicle crash. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-204 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Steering Hydraulic Assist System Component Description : Steering gear and power steering pump software Component Part Number : This is not a component problem it is a systems issue. Component Name 2 : This is not a component problem it is a systems is Component Description : This is not a component problem it is a systems issue. Component Part Number : This is not a component problem it is a systems issue. Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : March 21, 2022: Issued raised to Product Safety Working Group from Engineering, March 23, 2022: Issue approved for recommendation to Product Safety Group, March 24, 2022: Product Safety Committee approves recall decision, March 29, 2022: Internal notifications sent and 573 report filed with NHTSA. Description of Remedy : Description of Remedy Program : VEHICLES ARE BRAND NEW AND UNDER WARRANTY ANY PRENOTIFICATION REMEDIES PERFORMED OUTSIDE DEALER NETWORK ARE COVERED UNDER MACK’S PRE-NOTIFICATION REMEDY PROGRAM. How Remedy Component Differs from Recalled Component : Higher Ratio Steering gear and power steering pump software for higher RPM’s on the steering pump. Identify How/When Recall Condition was Corrected in Production : Stop Shipment at factory March 29, 2022. Vehicles are on hold pending remedy correction in production. Recall Schedule : Part 573 Safety Recall Report 22V-204 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : March 29, 2022: Notify Sales and Service and other internal stakeholders April 1, 2022: Notify Dealers and post VIN list, dealer alert to Trucks Dealer Portal By May 30, 2022: Notify owners of affected trucks Planned Dealer Notification Date : APR 01, 2022 – APR 01, 2022 Planned Owner Notification Date : MAY 30, 2022 – MAY 30, 2022 * NR – Not Reported

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