SCC0444 – Power Cables May Not Be Tightened Properly – 2019-2023 Mack LR Battery Electric Trucks

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-402 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : JUN 08, 2023 NHTSA Recall No. : 23V-402 Manufacturer Recall No. : SC0444 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 : 47 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2023 Mack LR Battery Electric Vehicle Type : Body Style : Power Train : NR Descriptive Information : Vehicles which were built during a period where power cable to relay torque are suspect of not being sufficient or properly controlled. Production Dates : SEP 17, 2018 – NOV 25, 2022 VIN Range 1 : Begin : 1M2LR1GC6KM002416 End : 1M2LRDGC9PM001060 ✔ Not sequential Description of Defect : Description of the Defect : Insufficient torque on the power cables to relays may result in a relay failure which could continue to power the cabin heater. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The risk is a loose connection to the relays which could result in a relay failure and overheating and failing in a closed position which could continue to power the cabin heater which could result in a fire. Description of the Cause : Torque control in the factory in-sufficient for application. Identification of Any Warning that can Occur : There are no warnings associated with this issue. Involved Components : Part 573 Safety Recall Report 23V-402 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Relay Component Description : Windshield Heater 24V/50A Component Part Number : NR Supplier Identification : Component Manufacturer Name : Mack Address : NR NR Country : NR Chronology : March 2, 2023 Reliability and Quality report to Product Safety Working Group that they have had two (2) cabin coolant heater relay failures which indicated the heater continued to stay powered and damaged the heater. March 8, 2023 Product Safety Working Group opens an investigation and requests failed components from the field. March 22, 2023 Engineering provides initial failure analysis results. March 27, 2023 Product Safety Working Group reviews product safety investigation results and recommends supplier of the relay provide their input and asks for additional review of incidents and vehicle data. May 15, 2023 Product Safety Working Group meets and recommends that this be brought to the Product Safety Committee as a potential product safety defect. May 30, 2023 The Product Safety Committee meets and decides that a product safety defect exists. June 4, 2023 573 Report filed with NHTSA There have been two (2) field reports, no warranty and no accidents or injuries reported with this issue Description of Remedy : Description of Remedy Program : Vehicles will be recalled and the power cables to relays will be properly torqued. 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 has proper torque on the fasteners on the power cables to the relays. Part 573 Safety Recall Report 23V-402 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Identify How/When Recall Condition was Corrected in Production : All vehicles impacted put on hold until the issue has been corrected Vehicles on hold will be corrected before being released. Production was corrected on March 29, 2023 Recall Schedule : Description of Recall Schedule : Dealer notification will begin on June 9, 2023 and owner notification will begin on or before August 4, 2023 Planned Dealer Notification Date : JUN 09, 2023 – JUN 09, 2023 Planned Owner Notification Date : AUG 04, 2023 – AUG 04, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-402 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : JUN 04, 2023 NHTSA Recall No. : 23V-402 Manufacturer Recall No. : SCC0444 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 : 47 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2019-2023 Mack LR Battery Electric Vehicle Type : Body Style : Power Train : NR Descriptive Information : Vehicles which were built during a period where power cable to relay torque are suspect of not being sufficient or properly controlled. Production Dates : SEP 17, 2018 – NOV 25, 2022 VIN Range 1 : Begin : 1M2LR1GC6KM002416 End : 1M2LRDGC9PM001060 ✔ Not sequential Description of Defect : Description of the Defect : Insufficient torque on the power cables to relays may result in a relay failure which could continue to power the cabin heater. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : The risk is a loose connection to the relays which could result in a relay failure and overheating and failing in a closed position which could continue to power the cabin heater which could result in a fire. Description of the Cause : Torque control in the factory in-sufficient for application. Identification of Any Warning that can Occur : There are no warnings associated with this issue. Involved Components : Part 573 Safety Recall Report 23V-402 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Relay Component Description : Windshield Heater 24V/50A Component Part Number : NR Supplier Identification : Component Manufacturer Name : Mack Address : NR NR Country : NR Chronology : March 2, 2023 Reliability and Quality report to Product Safety Working Group that they have had two cabin coolant heater relay failures which indicated the heater continued to stay powered and damaged the heater. March 8, 2023 Product Safety Working Group opens an investigation and requests failed components from the field. March 22, 2023 Engineering provides initial failure analysis results. March 27, 2023 Product Safety Working Group reviews product safety investigation results and recommends supplier of the relay provide their input and asks for additional review of incidents and vehicle data. May 15, 2023 Product Safety Working Group meets and recommends that this be brought to to the Product Safety Committee as a potential product safety defect. May 30, 2023 The Product Safety Committee meets and decides that a product safety defect exists. June 4, 2023 573 Report filed with NHTSA There have been 2 field reports, and no accidents or injuries reported with this issue Description of Remedy : Description of Remedy Program : Vehicles will be recalled and the power cables to relays will be properly torqued. 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 has proper torque on the fasteners on the power cables to the relays. Identify How/When Recall Condition was Corrected in Production : All vehicles impacted put on hold until the issue has been corrected Vehicles on hold will be corrected before being released. Production was corrected on March 29, 2023 Part 573 Safety Recall Report 23V-402 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : Dealer notification will begin on June 9, 2023 and owner notification will begin on August 4, 2023 Planned Dealer Notification Date : JUN 09, 2023 – JUN 09, 2023 Planned Owner Notification Date : AUG 04, 2023 – AUG 04, 2023 * NR – Not Reported

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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 Insufficient torque on the power cables to relays may result in a relay failure which could continue to power the cabin heater. Relay failure and overheating could result in a vehicle fire. There have been no warranty claims, field reports, accidents or injuries reported with this issue. Vehicles will be recalled and the power cables to relays will be properly torqued. Model and Model Years Affected  Certain 2019-2023 Mack LRBE model vehicles manufactured September 17, 2018 through December 14, 2022. Vehicle Quantities  52 (47 US, 5 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 June 9, 2023. • Owner notification letters will be released on or before August 4, 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 SC0444, E Mob Heater Relay Recall Number: SRA-M444 Date: June 9, 2023 Applicable Markets: ☒U.S. ☒Canada ☐ Export

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