2026–2027 Mack Anthem AN (4), Mack Pioneer PR (4): Service Brakes, Electric recall
NHTSA campaign 26V620000 · 850 units potentially affected · filed Sep 28, 2026
What's wrong
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.
Why it matters
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
The fix
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.
Recall details
- NHTSA campaign
- 26V620000
- Manufacturer no.
- SC0500
- Manufacturer
- Mack Trucks, Inc.
- Component
- SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING
- Units affected
- 850
- Report received
- Sep 28, 2026
- Owner letters
- —
- Type
- Vehicle
Check whether your vehicle is included with the official NHTSA VIN lookup or your dealer. Repairs for safety recalls are free.
Vehicles covered
- Mack Anthem AN (4) 2026, 2027
- Mack Pioneer PR (4) 2026, 2027