Mack recall: Service Brakes, Electric
NHTSA campaign 26V620000 · Manufacturer no. SC0500 · Reported Sep 28, 2026 · 850 units · Vehicle recall
What's wrong
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.
Affected vehicles
| Make | Model | Years |
|---|---|---|
| Mack | ANTHEM AN (4) | 2026-2027 |
| Mack | PIONEER PR (4) | 2026-2027 |
Filed by Mack Trucks, Inc.. Components: SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING.
Full NHTSA text
Defect: 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.
Consequence: 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.
Check your VIN at nhtsa.gov/recalls or call your dealer. Repairs under a safety recall are free.