2026–2027 Mack Anthem AN (4), 2025–2027 Mack Pioneer PR (4) Recall: Rear brake modulators may have unprotected electrical connectors that can…
NHTSA campaign 26V261000 · Service Brakes, Air · filed Apr 23, 2026 · verified Jul 30, 2026
The 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).
The risk
A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — 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.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Mack | Anthem AN (4) | 2026, 2027 |
| Mack | Pioneer PR (4) | 2025, 2026, 2027 |
Related recalls
More Mack Anthem AN (4) recalls
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 26V261000 (manufacturer number SC0494). Data last verified Jul 30, 2026.