2024 Mack MD (Electric) problems

What is wrong

Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Medium-Duty Electric (MDe) vehicles that were incorrectly manufactured with the hill start assist (HSA) message enabled.

Risk

A false hill start assist message can lead to unexpected vehicle rollback on an incline, increasing the risk of a crash.

Remedy

Dealers will update the dashboard notification software and add a correction to the owner's manual, free of charge. Owner notification letters are expected to be mailed December 28, 2026. Owners may contact Mack's customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0502. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning November 5, 2026.

Recall number 26V719000 · Recall details

What is wrong

Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Mack MD, 2019-2025 Anthem, Granite, 2024 MD Electric, and 2025 Pinnacle trucks equipped with a passenger bench seat. The seat belt anchorage bracket may be improperly welded. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."

Risk

An improperly welded seat belt anchorage bracket can detach during a crash, increasing the risk of injury.

Remedy

Dealers will install a reinforcement plate, free of charge. Owner letters were mailed January 21, 2026. Owners may contact Mack's customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0485. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning October 13, 2025.

Recall number 25V666000 · Recall details

What is wrong

Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Mack MD vehicles. When the Controller Area Network (CAN) communications are interrupted, the throttle signal from the electro mobility control unit may retain the last known throttle setting, and the engine will not return to idle as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."

Risk

An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.

Remedy

Dealers will update the control unit software, free of charge. Owner notification letters were mailed August 14, 2025. Owners may contact Mack's customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0481.

Recall number 25V427000 · Recall details

What is wrong

Mack Trucks, Inc. (Mack) is recalling certain 2024 MD vehicles. An incorrectly assembled high voltage connector could prevent the mechanical connector lock from properly engaging, allowing the high voltage cable to loosen.

Risk

A loose high voltage cable can cause a sudden loss of steering and drive power, increasing the risk of crash.

Remedy

Owners are advised not to drive their vehicles until the remedy has been completed. Dealers will inspect and repair the mechanical connector lock as necessary, free of charge. Owner notification letters were mailed July 10, 2024. Owners may contact Mack customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0467.

Recall number 24V447000 · Recall details

What is wrong

Mack Trucks, Inc. (Mack) is recalling certain 2024 MMDe electric trucks. The battery management system software may cause the high-voltage battery to shut down, which can result in a sudden loss of steering control and drive power.

Risk

A sudden loss of steering control and drive power increases the risk of a crash.

Remedy

Owners are advised not to drive their vehicles until the remedy has been completed. Dealers will update the battery management system software, free of charge. Owner notification letters were mailed July 10, 2024. Owners may contact Mack customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0464.

Recall number 24V399000 · Recall details