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.
Brakes
Mack RB Brake problems by year
0 complaints filed with NHTSA about the Mack RB's brakes. Spongy or hard pedal, ABS faults, brake failure, noises, parking brake and brake fluid leaks.
Brake complaints by model year
Brake recalls
Air system blockage in the air dryer occurs degrading the moisture removing capabilities of the dryer when the vehicle is operated in a cold environment and moisture accumulates and freezes in the air dryer or in the line between the dryer and the air system...
Latest RB brake complaints
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data