Mack recalls 2024–2026 MD electric trucks over false hill start assist message
151 vehicles were built with the hill start assist message turned on by mistake, and this false message can lead to unexpected rollback on an incline, which raises the risk of a crash.
What to do
Dealers will update the dashboard notification software and add a correction to the owner's manual, free of charge. Owners may contact Mack's customer service at 1-800-866-1177 and cite recall number SC0502.
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Recall details
- Product
- Mack Md (Electric) 2024–2026
- Company
- Mack Trucks, Inc.
- Hazard
- A false hill start assist message can lead to unexpected vehicle rollback on an incline, increasing the risk of a crash.
- Units
- 151 vehicles
- Reported to NHTSA
- October 29, 2026
- Identifiers
- NHTSA campaign number: 26V719000
- Manufacturer campaign number: SC0502
- Model years: 2024–2026
The headline, summary and steps above are written in plain English from the official notice below. Identifiers are copied exactly as the agency published them. Always check the official notice before you act.
Official notice
The notice's own wording from NHTSA.
- Component
- ELECTRICAL SYSTEM:ADAS:HILL DESCENT ASSIST:SOFTWARE
- Defect
- 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.
- Consequence
- A false hill start assist message can lead to unexpected vehicle rollback on an incline, increasing the risk of a crash.
- Corrective action
- 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 NHTSA.gov beginning November 5, 2026.
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