United StatesCertain Mack Trucks 2025–2027 Pioneer (4) and 2026–2027 Anthem (4) vehicles are affected; VINs for involved vehicles will be searchable on NHTSA.gov beginning April 30, 2026. Mack says rear brake modulators may have unprotected electrical connectors that can short circuit and cause loss of anti-lock brakes and electronic stability control; dealers will inspect the connectors, install a protective cover, and replace modulators as needed free of charge, and owner letters were mailed June 8, 2026 (Mack recall SC0494, NHTSA 26V261000).
What's being recalled
Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-2027 Anthem (4) vehicles. The rear brake modulators may have unprotected electrical connectors that can short circuit and lead to a loss of the anti-lock brake system (ABS) and electronic stability control (ESC).
How to identify it
NHTSA campaign 26V261000; Manufacturer campaign SC0494
The hazard
A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
What to do
Dealers will inspect the rear brake modulator electrical connectors, install a protective cover, and replace the rear brake modulators, as necessary, free of charge. Owner notification letters were mailed June 8, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0494. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning April 30, 2026.
The official notice
This page is a summary of the notice published by U.S. National Highway Traffic Safety Administration, collected from U.S. National Highway Traffic Safety Administration. Check the original before you act on it.
Read the official notice (opens in a new tab)