Hill descent assist: softwareRecall 26V-719 · 2024–2026 Mack MD (electric)
Mack Trucks, Inc. recall 26V-719 covers 151 2024–2026 Mack MD (electric) for a hill descent assist: software problem, reported to NHTSA on October 29, 2026.
Source: NHTSA recall 26V719000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
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.
The risk
A false hill start assist message can lead to unexpected vehicle rollback on an incline, increasing the risk of a crash.
The fix
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from June 22, 2023 to September 25, 2025. Not every vehicle in these model years is included; check by VIN.