- Vehicles
- 20,668
- Built between
- Not published
- Models
- 4
- Recall type
- Vehicle
- Initiated by
- NHTSA investigation
- Owners notified
- 8 February 2022
- Repaired
- 52%
- Unrepaired
- 9,962
Does this affect my vehicle?
The manufacturer did not publish a build-date range for this recall, so the model and year list below is the only way to tell whether your vehicle is covered.
- 2008-2010 Mack MRU
- 2019-2021 Mack TE
- 2011-2019 Mack Terrapro (MRU)
- 2022 Mack Terrapro (TE)
Repair progress
9,962 of 20,668 vehicles in this recall had still not been repaired as of Q4 2023.
52% repaired — 10,706 of 20,668 reported
Manufacturers file these figures with NHTSA each quarter. Vehicles the manufacturer could not trace, or that have been scrapped or exported, are counted separately and are not included in the unrepaired figure.
What the defect is
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.
What could happen
The unexpected release of the parking brake may allow the vehicle to rollaway, increasing the risk of a crash.
What gets fixed
Dealers will remove the exhaust tube and fitting from the valve, free of charge. Owner notification letters were mailed February 8, 2022.
Parts involved
- PP1 Valve combined with exhaust tube.25117989Dash mounted park brake control valve used to apply and release the valve. Fitting and air tube attached to the valve's exhaust port.
Part numbers are as filed by the manufacturer and are listed for reference. Your dealer will confirm the correct part for your vehicle.
Timeline
- Recall reported to NHTSA9 December 2021
- Owners notified8 February 2022
- Latest repair reportQ4 2023 — 52% repaired
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 9 December 2021.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Manufacturer contact
Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0433.
Official source
- Manufacturer's recall number
- SC0433
- Recalling manufacturer
- Mack Trucks, Inc.
- Recall initiated by
- ODI
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Check your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.