SC449 – Loose Steering Gear Fasteners – 2024 Mack MD6 & MD7

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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 Certain 2024 MD6 and MD7 model vehicles were manufactured from June 23, 2023 to July 21, 2023 when improperly calibrated torque tooling was in use. Under-torqued fasteners can result in loss of clamp load, which may affect the steering and potentially cause loss of vehicle control. There have been no field reports, warranty claims or customer complaints associated with this issue. The remedy will be to tighten the steering gear fasteners to specification. Model and Model Years Affected • Certain 2024 Mack MD6 and MD7 model vehicles manufactured June 23, 2023 through July 21, 2023. Vehicle Quantities • 409 vehicles (395 US, 14 Canada) 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 September 1, 2023. • Owner notification letters will be released on or before October 23, 2023. • Repair Instruction will be released once they are available. Contact If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com. Subject: Safety Recall SC0449, MMD Steering Gear Torque Recall Number: SRA-M449 Date: September 1, 2023 Applicable Markets: ☒U.S. ☒Canada ☐ Export

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-605 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : AUG 30, 2023 NHTSA Recall No. : 23V-605 Manufacturer Recall No. : SC449 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 : 395 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2024-2024 Mack MD6 and MD7. Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : UNKNOWN Power Train : DIESEL Descriptive Information : Certain 2024 MD 6 and MD 7 models manufactured from June 23, 2023 and July 21, 2023 when improperly calibrated torque tooling was in use. The number of affected vehicles is 395. Production Dates : JUN 23, 2023 – JUL 21, 2023 VIN Range 1 : Begin : 1M2MDBAA5RS010044 End : 1M2MDBAA6RS012417 ✔ Not sequential Description of Defect : Description of the Defect : The steering gear fasteners may not be torqued to specification. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Under-torqued fasteners can result in loss of clamp load, which may affect the steering and potentially cause loss of vehicle control. There have been no reports of accidents or loss of vehicle control associated with this condition. Description of the Cause : Manufacturing issue. Torque tool used in tightening steering gear fasteners was improperly calibrated and final assembly torque was not to specification. Identification of Any Warning that can Occur : Loose fasteners are detectable during visual inspection, driver alignment and the driver may be able to discern that there is an issue felt in the steering/ handling of the vehicle. Involved Components : Part 573 Safety Recall Report 23V-605 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : M20*140 Component Description : HEXAGON SCREW Component Part Number : 00992482 Supplier Identification : Component Manufacturer Name : Mack Trucks Address : 7825 National Service Rd. Greensboro North Carolina 27409-9667 Country : United States Chronology : August 15 2023 Mack Manufacturing Engineering reports to Product Safety Working Group that Mack Medium Duty assembly plant has reported that the have a potential under torque situation on steering gear fasteners, an investigation is opened at that time. August 21, 2023 Product Safety Working Group meets and evaluates the investigation results and recommends that this be brought to Product Safety Committee as a potential product safety defect. August 25, 2023 Product Safety Committee meets and decides that a product safety defect exists. August 30, 2023 573 Report filed with NHTSA. There have been no field reports, warranty claims or customer complaints associated with this issue. Description of Remedy : Description of Remedy Program : Remedy program will be to tighten the steering gear fasteners to specification Reimbursement for the recall will be covered by Manufacturer’s Reimbursement Plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The remedy, component fasteners will be properly tightened to specification. 00992482, HEXAGON SCREW, M20*140 Identify How/When Recall Condition was Corrected in Production : Torque assembly tooling in our factory was corrected on August 4, 2023. Recall Schedule : Part 573 Safety Recall Report 23V-605 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : Dealer notification will begin on September 4, 2023 and owner notification will begin on or before October 23, 2023 Planned Dealer Notification Date : SEP 04, 2023 – SEP 04, 2023 Planned Owner Notification Date : OCT 23, 2023 – OCT 23, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-605 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : SEP 06, 2023 NHTSA Recall No. : 23V-605 Manufacturer Recall No. : SC449 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 : 395 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2024-2024 Mack MD6 and MD7. Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : UNKNOWN Power Train : DIESEL Descriptive Information : Certain 2024 MD 6 and MD 7 models manufactured from June 23, 2023 and July 21, 2023 when improperly calibrated torque tooling was in use. The number of affected vehicles is 395. Production Dates : JUN 23, 2023 – JUL 21, 2023 VIN Range 1 : Begin : 1M2MDBAA5RS010044 End : 1M2MDBAA6RS012417 ✔ Not sequential Description of Defect : Description of the Defect : The steering gear fasteners may not be torqued to specification. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Under-torqued fasteners can result in loss of clamp load, which may affect the steering and potentially cause loss of vehicle control and an increased risk of a crash. There have been no reports of accidents or loss of vehicle control associated with this condition. Description of the Cause : Manufacturing issue. Torque tool used in tightening steering gear fasteners was improperly calibrated and final assembly torque was not to specification. Identification of Any Warning that can Occur : Loose fasteners are detectable during visual inspection, driver alignment and the driver may be able to discern that there is an issue felt in the steering/ handling of the vehicle. Involved Components : Part 573 Safety Recall Report 23V-605 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : M20*140 Component Description : HEXAGON SCREW Component Part Number : 00992482 Supplier Identification : Component Manufacturer Name : Mack Trucks Address : 7825 National Service Rd. Greensboro North Carolina 27409-9667 Country : United States Chronology : August 15 2023 Mack Manufacturing Engineering reports to Product Safety Working Group that Mack Medium Duty assembly plant has reported that the have a potential under torque situation on steering gear fasteners, an investigation is opened at that time. August 21, 2023 Product Safety Working Group meets and evaluates the investigation results and recommends that this be brought to Product Safety Committee as a potential product safety defect. August 25, 2023 Product Safety Committee meets and decides that a product safety defect exists. August 30, 2023 573 Report filed with NHTSA. There have been no field reports, warranty claims or customer complaints associated with this issue. Description of Remedy : Description of Remedy Program : Remedy program will be to tighten the steering gear fasteners to specification Reimbursement for the recall will be covered by Manufacturer’s Reimbursement Plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The remedy, component fasteners will be properly tightened to specification. 00992482, HEXAGON SCREW, M20*140 Identify How/When Recall Condition was Corrected in Production : Torque assembly tooling in our factory was corrected on August 4, 2023. Recall Schedule : Part 573 Safety Recall Report 23V-605 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : Dealer notification will begin on September 4, 2023 and owner notification will begin on or before October 23, 2023 Planned Dealer Notification Date : SEP 04, 2023 – SEP 04, 2023 Planned Owner Notification Date : OCT 23, 2023 – OCT 23, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-605 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : SEP 06, 2023 NHTSA Recall No. : 23V-605 Manufacturer Recall No. : SC0449 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 : 395 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2024-2024 Mack MD6 and MD7. Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : UNKNOWN Power Train : DIESEL Descriptive Information : Certain 2024 MD 6 and MD 7 models manufactured from June 23, 2023 and July 21, 2023 when improperly calibrated torque tooling was in use. The number of affected vehicles is 395. Production Dates : JUN 23, 2023 – JUL 21, 2023 VIN Range 1 : Begin : 1M2MDBAA5RS010044 End : 1M2MDBAA6RS012417 ✔ Not sequential Description of Defect : Description of the Defect : The steering gear fasteners may not be torqued to specification. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Under-torqued fasteners can result in loss of clamp load, which may affect the steering and potentially cause loss of vehicle control and an increased risk of a crash. There have been no reports of accidents or loss of vehicle control associated with this condition. Description of the Cause : Manufacturing issue. Torque tool used in tightening steering gear fasteners was improperly calibrated and final assembly torque was not to specification. Identification of Any Warning that can Occur : Loose fasteners are detectable during visual inspection, driver alignment and the driver may be able to discern that there is an issue felt in the steering/ handling of the vehicle. Involved Components : Part 573 Safety Recall Report 23V-605 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : M20*140 Component Description : HEXAGON SCREW Component Part Number : 00992482 Supplier Identification : Component Manufacturer Name : Mack Trucks Address : 7825 National Service Rd. Greensboro North Carolina 27409-9667 Country : United States Chronology : August 15 2023 Mack Manufacturing Engineering reports to Product Safety Working Group that Mack Medium Duty assembly plant has reported that the have a potential under torque situation on steering gear fasteners, an investigation is opened at that time. August 21, 2023 Product Safety Working Group meets and evaluates the investigation results and recommends that this be brought to Product Safety Committee as a potential product safety defect. August 25, 2023 Product Safety Committee meets and decides that a product safety defect exists. August 30, 2023 573 Report filed with NHTSA. There have been no field reports, warranty claims or customer complaints associated with this issue. Description of Remedy : Description of Remedy Program : Remedy program will be to tighten the steering gear fasteners to specification Reimbursement for the recall will be covered by Manufacturer’s Reimbursement Plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The remedy, component fasteners will be properly tightened to specification. 00992482, HEXAGON SCREW, M20*140 Identify How/When Recall Condition was Corrected in Production : Torque assembly tooling in our factory was corrected on August 4, 2023. Recall Schedule : Part 573 Safety Recall Report 23V-605 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : Dealer notification will begin on September 4, 2023 and owner notification will begin on or before October 23, 2023 Planned Dealer Notification Date : SEP 04, 2023 – SEP 04, 2023 Planned Owner Notification Date : OCT 23, 2023 – OCT 23, 2023 * NR – Not Reported

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