Mack recalls 2025–2027 Pioneer and 2026–2027 Anthem trucks over brake wiring that can short circuit
Unprotected electrical connectors on the rear brake modulators can short circuit and knock out the anti-lock brakes and electronic stability control, raising the risk of a crash or injury.
What to do
Dealers will inspect the connectors, add a protective cover and replace the rear brake modulators if needed, free of charge. Owners may call Mack customer service at 1-800-866-1177 and cite recall number SC0494.
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Recall details
- Product
- Mack Pioneer Pr (4), Anthem An (4) 2025–2027
- Company
- Mack Trucks, Inc.
- Hazard
- A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
- Units
- 2,772 vehicles
- Owner notification
- June 8, 2026
- Reported to NHTSA
- April 23, 2026
- Identifiers
- NHTSA campaign number: 26V261000
- Manufacturer campaign number: SC0494
- Model years: 2025–2027
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
- SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE
- Defect
- 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).
- Consequence
- A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
- Corrective action
- 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.
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