Autocar is recalling 532 model year 2011-2013 ACX trucks manufactured Jan. 24, 2011, through Dec. 4, 2012, that are equipped with Meritor axle assemblies that were built with disc brakes using MGM J24 series air brake chambers.

A National Highway Traffic Safety Administration bulletin says in the affected axles, the brake chambers may leak pressure allowing the parking brake to drag when it is supposed to be released, which could lead to overheated brake components, resulting in a possible fire.

Autocar will notify owners and will replace the actuators as needed, free of charge. The safety recall is expected to begin June 10.

Owners may contact Autocar at 1-765-489-5499, the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 or go to The campaign recall number is A-1301.