Mack Anthem AN (4), Pioneer PR (4) (2026-2027): Service brakes, electric
Recall 26V620000 · Sep 28, 2026 · Mack Trucks, Inc.
850
vehicles affected
850
vehicles affected
Facts
- Recall number
- 26V620000
- Date
- Sep 28, 2026
- Maker
- Mack Trucks, Inc.
- Units affected
- 850
- Kind
- Vehicles
- Component
- Service brakes, electric > Software/programming
- Model years
- 2026-2027
- Started by
- The maker
- Hazard
- Crash risk
What is 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.
What can happen
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
The fix
Recall repairs are free of charge.
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.
Vehicles covered
2 models, 4 model years in all
| Make | Model | Model years |
|---|---|---|
| Mack | Anthem AN (4) | 2026-2027 |
| Mack | Pioneer PR (4) | 2026-2027 |
Related pages
Questions and answers
Which vehicles are in recall 26V620000?
2 models: Mack Anthem AN (4) (2026-2027), Mack Pioneer PR (4) (2026-2027), about 850 vehicles in all.
What is the fix for recall 26V620000?
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.
What can happen?
Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.
A recall means the maker found a safety problem and offers a free fix; it does not mean every unit has the problem. Units affected are as reported by the company. Popular models sell more and so have more recalls and complaints. Official public data; texts are shortened. A dealer can tell whether a single vehicle still needs the repair.