Official recall notice
Software Calculation Error May Cause Reduced Braking Performance
- Recall date
- 2026-09-28
- Brand
- Mack Trucks, Inc.
- Category
- Vehicle
- Units affected
- 850
- Vehicle
- Mack Trucks, Inc.
Why it was recalled
Hazard
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
Recommended action
What to do
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.
Product description
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.