High Voltage Battery Pack May Short Circuit – 2022-2023 Mack LRE

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October 20, 2022 REGARDING: NHTSA RECALL ID: 22V706 (SC0439) A short in the battery cell there is a risk of a battery fire and subsequent vehicle fire. 1. I work with Regulatory Affairs for Mack Trucks, Inc., P.O. Box 26115, Greensboro, North Carolina 27402, and am authorized to make this statement on its behalf. 2. Mack Trucks, Inc., was the manufacturer of a certain 2021 LRE hybrid electric vehicle identified with a potential safety defect. There is 1 vehicle involved in the recall which is company owned therefore no owner notification letter will be distributed as there are no customers to send recall letters to. Mack is actively acquiring parts to remedy the safety defect. Sincerely, Gerard M. Hones Regulatory Affairs Mack Trucks, Inc. MACK TRUCKS, INC. PO BOX 26115 GREENSBORO, NC 27402-6115

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-706 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : SEP 30, 2022 NHTSA Recall No. : 22V-706 Manufacturer Recall No. : NR 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 : 1 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 Mack LRE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : The population of vehicles equipped with Akasol Gen 3 batteries produced in their German facility is 2. Neither of the affected vehicles have been sold to customers, but are rather company-owned test vehicles. Production Dates : MAY 21, 2021 – JUN 24, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Coolant Line in battery pack may not be fully seated and locked and result in the loss of coolant and a short in a battery cell. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : With a short in the battery cell there is a risk of a battery fire and subsequent vehicle fire. Description of the Cause : Manufacturing defect in the assembly of the battery packs which could allow a partially seated connector to pass their test equipment in Germany. Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-706 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Battery Component Description : Battery, complete battery pack Component Part Number : 23364826 Supplier Identification : Component Manufacturer Name : Akasol Inc. Address : 1400 E. 10 Mile Road Suite 15 Hazel Park Michigan 48030 Country : United States Chronology : On June 30 , 2022 information concerning a battery fire that occurred in Akasol’s Darmstedt Germany manufacturing plant was received by Volvo. On September 6, 2022 Volvo Product Safety Working Group initiates a safety investigation. Based upon Akasol’s findings and concerns on September 13, 2022Product Safety Working Group makes a recommendation to bring the issue to Product Safety Committee with a recommendation to make a product safety defect determination and recall potentially impacted vehicles. Volvo Product Safety Committee met on September 15, 2022 and makes the determination that a product safety defect exists and to execute a recall. There have been no warranty claims, field reports, accidents or injuries reported with this issue. Description of Remedy : Description of Remedy Program : All vehicles are under warranty and as such any reimbursements would be claimed under standard warranty process. How Remedy Component Differs from Recalled Component : Vehicles which may be equipped with Akasol Gen 3 Batteries will be inspected for the suspect batteries from Germany. Those battery packs will be inspected for the potential defect of in-complete engagement of the coolant line locking mechanism. Identify How/When Recall Condition was Corrected in Production : The testing equipment which was “passing” suspect parts has been taken out of service and two separate checks are being done on the lock engagement on the coolant lines. July 29. 2022 Recall Schedule : Part 573 Safety Recall Report 22V-706 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : We currently believe none of the affected vehicles have been sold to customers, but are rather company-owned test vehicles, therefore no dealer or owner notifications will be issued. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-706 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : OCT 20, 2022 NHTSA Recall No. : 22V-706 Manufacturer Recall No. : NR 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 : 1 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2021-2021 Mack LRE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : The population of vehicles equipped with Akasol Gen 3 batteries produced in their German facility is 2. Neither of the affected vehicles have been sold to customers, but are rather company-owned test vehicles. Production Dates : MAY 18, 2020 – MAY 18, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Coolant Line in battery pack may not be fully seated and locked and result in the loss of coolant and a short in a battery cell. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : With a short in the battery cell there is a risk of a battery fire and subsequent vehicle fire. Description of the Cause : Manufacturing defect in the assembly of the battery packs which could allow a partially seated connector to pass their test equipment in Germany. Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-706 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Battery Component Description : Battery, complete battery pack Component Part Number : 23364826 Supplier Identification : Component Manufacturer Name : Akasol Inc. Address : 1400 E. 10 Mile Road Suite 15 Hazel Park Michigan 48030 Country : United States Chronology : On June 30 , 2022 information concerning a battery fire that occurred in Akasol’s Darmstedt Germany manufacturing plant was received by Volvo. On September 6, 2022 Volvo Product Safety Working Group initiates a safety investigation. Based upon Akasol’s findings and concerns on September 13, 2022Product Safety Working Group makes a recommendation to bring the issue to Product Safety Committee with a recommendation to make a product safety defect determination and recall potentially impacted vehicles. Volvo Product Safety Committee met on September 15, 2022 and makes the determination that a product safety defect exists and to execute a recall. There have been no warranty claims, field reports, accidents or injuries reported with this issue. Description of Remedy : Description of Remedy Program : All vehicles are under warranty and as such any reimbursements would be claimed under standard warranty process. How Remedy Component Differs from Recalled Component : Vehicles which may be equipped with Akasol Gen 3 Batteries will be inspected for the suspect batteries from Germany. Those battery packs will be inspected for the potential defect of in-complete engagement of the coolant line locking mechanism. Identify How/When Recall Condition was Corrected in Production : The testing equipment which was “passing” suspect parts has been taken out of service and two separate checks are being done on the lock engagement on the coolant lines. July 29. 2022 Recall Schedule : Part 573 Safety Recall Report 22V-706 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : We currently believe none of the affected vehicles have been sold to customers, but are rather company-owned test vehicles, therefore no dealer or owner notifications will be issued. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-706 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mack Trucks, Inc. Submission Date : SEP 21, 2022 NHTSA Recall No. : 22V-706 Manufacturer Recall No. : NR 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 : 2 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 Mack LRE Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : The population of vehicles equipped with Akasol Gen 3 batteries produced in their German facility is 2. Neither of the affected vehicles have been sold to customers, but are rather company-owned test vehicles. Production Dates : MAY 21, 2021 – JUN 24, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Coolant Line in battery pack may not be fully seated and locked and result in the loss of coolant and a short in a battery cell. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : With a short in the battery cell there is a risk of a battery fire and subsequent vehicle fire. Description of the Cause : Manufacturing defect in the assembly of the battery packs which could allow a partially seated connector to pass their test equipment in Germany. Identification of Any Warning that can Occur : NR Involved Components : Part 573 Safety Recall Report 22V-706 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 1 : Battery Component Description : Battery, complete battery pack Component Part Number : 23364826 Supplier Identification : Component Manufacturer Name : Akasol Inc. Address : 1400 E. 10 Mile Road Suite 15 Hazel Park Michigan 48030 Country : United States Chronology : On June 30 , 2022 information concerning a battery fire that occurred in Akasol’s Darmstedt Germany manufacturing plant was received by Volvo. On September 6, 2022 Volvo Product Safety Working Group initiates a safety investigation. Based upon Akasol’s findings and concerns on September 13, 2022Product Safety Working Group makes a recommendation to bring the issue to Product Safety Committee with a recommendation to make a product safety defect determination and recall potentially impacted vehicles. Volvo Product Safety Committee met on September 15, 2022 and makes the determination that a product safety defect exists and to execute a recall. There have been no warranty claims, field reports, accidents or injuries reported with this issue. Description of Remedy : Description of Remedy Program : All vehicles are under warranty and as such any reimbursements would be claimed under standard warranty process. How Remedy Component Differs from Recalled Component : Vehicles which may be equipped with Akasol Gen 3 Batteries will be inspected for the suspect batteries from Germany. Those battery packs will be inspected for the potential defect of in-complete engagement of the coolant line locking mechanism. Identify How/When Recall Condition was Corrected in Production : The testing equipment which was “passing” suspect parts has been taken out of service and two separate checks are being done on the lock engagement on the coolant lines. July 29. 2022 Recall Schedule : Part 573 Safety Recall Report 22V-706 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Recall Schedule : We currently believe none of the affected vehicles have been sold to customers, but are rather company-owned test vehicles, therefore no dealer or owner notifications will be issued. Planned Dealer Notification Date : NR – NR Planned Owner Notification Date : NR – NR * NR – Not Reported

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