Mack brake control valve air leak into the attached exhaust hose can create excessive back pressure, causing the parking brake to release unexpectedly.
The short version
Mack Trucks, Inc. reported a problem with the parking brake. Here is what owners need to know.
A brake control valve air leak into the attached exhaust hose can create excessive back pressure, causing the parking brake to release unexpectedly.
The unexpected release of the parking brake may allow the vehicle to rollaway, increasing the risk of a crash.
Take it to a dealer — they will remove the exhaust tube and fitting from the valve, free of charge.
Affected vehicles
These model years are included in NHTSA campaign 21V-953.
| YEAR RANGE | MODEL |
|---|---|
| 2011–2022 | Mack Terrapro |
What changed
Newest first. The record shows both when the recall began and what has changed since.
- Recall reported to NHTSA. LATEST
Drive one of these? Check your VIN to see if your specific vehicle is affected.
Check your VINWhat this record means
Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.
Not affiliated
MyAutoRecalls is not affiliated with Mack Trucks, Inc. or the National Highway Traffic Safety Administration.