CarRecallWatch- Component
- SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING
- Problem
- Mack Trucks, Inc. (Mack) is recalling certain 2026-2027 Anthem AN (4) and Pioneer PR (4) vehicles equipped with a tanker application package. Inaccurate axle load calculations may cause reduced braking performance while transporting smoothbore tanker trailers.
- Risk
- Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
- Remedy
- Dealers will install new software to disable the dynamic trailer braking calculations, free of charge. Owner notification letters are expected to be mailed November 27, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0500. Vehicle Identification Numbers (VINs) involved in this recall will become searchable on NHTSA.gov on October 5, 2026.
What this recall means for you
Certain 2026-2027 Mack Anthem and Pioneer trucks equipped with a tanker application package may calculate axle loads inaccurately. This can reduce braking performance while hauling smoothbore tanker trailers.
Reduced braking performance means the vehicle may need a greater distance to stop, which increases the risk of a crash. Owners should be aware of this when operating these trucks with smoothbore tanker trailers.
Authorized Mack dealers will install new software that disables the dynamic trailer braking calculations, at no cost to the owner. Owner notification letters are expected to be mailed November 27, 2026. You can also contact Mack customer service at 1-800-866-1177 (recall SC0500), and check your VIN for open recalls at NHTSA.gov once VINs become searchable on October 5, 2026.
Check whether this recall is open on your vehicle
Official recall notice
Affected vehicles
| Mack Anthem AN (4) | 20262027 |
|---|---|
| Mack Pioneer PR (4) | 20262027 |