Vehicle recall 01V189004 · August 1, 2001
Mack CH, CL and 7 more models
Vehicle description: heavy duty trucks equipped with certain meritor-wabco brake system two and four port relay valves.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Vehicle description: heavy duty trucks equipped with certain meritor-wabco brake system two and four port relay valves. The valve may stick open when a high-pressure application is released.
- Consequence
- When the valve sticks open, it can result in a total loss of air from either the service or the park brake system. The driver may lose braking ability under a service application, possibly resulting in a vehicle crash.
- Remedy
- Dealers will replace these valves. Owner notification began November 16, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3011 or meritor wabco at 800-535-5560.
- Notes
- Also contact the national highway traffic safety administration's auto safety hotline at 1-888-dash-2-dot (1-888-327-4236).
Recall details
- NHTSA campaign
- 01V189004
- Reported to NHTSA
- August 1, 2001
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- November 16, 2001
- Vehicles potentially affected
- 8,268
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Controls, pedals and linkages
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.