Parking brakeRecall 21V-953 · Mack vehicles
Mack Trucks, Inc. recall 21V-953 covers 20,668 Mack vehicles for a parking brake problem, reported to NHTSA on December 9, 2021. The manufacturer's latest report (2023 Q4) shows 52% of affected vehicles repaired.
Source: NHTSA recall 21V953000 and manufacturer quarterly reports. Started by an NHTSA defect investigation.
The problem
Mack Trucks, Inc. (Mack) is recalling certain 2008-2019 TerraPro (MRU) and 2019-2022 TerraPro (TE) vehicles. A brake control valve air leak into the attached exhaust hose can create excessive back pressure, causing the parking brake to release unexpectedly.
The risk
The unexpected release of the parking brake may allow the vehicle to rollaway, increasing the risk of a crash.
The fix
Dealers will remove the exhaust tube and fitting from the valve, free of charge. Owner notification letters were mailed February 8, 2022. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0433.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
52%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA.
The investigation behind this recall
- Vehicle Roll AwayNHTSA