NAVISTAR issued a recall on multiple vehicle models

A DEFECTIVE THROTTLE VALVE LOCATED INSIDE THE HYDRAULIC BRAKE BOOSTER, MAY DEFORM FROM A BUILDUP OF HEAT AND PRESSURE AND CLOSE OFF THE HYDRAULIC FLUID RETURN PORTS. THIS WOULD CAUSE EXCESSIVE PRESSURE TO BUILD UP IN THE BOOSTER AND CAUSE THE BRAKES TO SELF APPLY AND FORCE AN UNEXPECTED SEVERE STOP. THIS CONDITION WOULD ALSO CAUSE LOSS OF POWER STEERING ASSIST ON VEHICLES EQUIPPED WITH POWER STEERING. THIS DEFECT CAN RESULT IN LOSS OF CONTROL AND A CRASH WITHOUT PRIOR WARNING. CORRECTION: BRAKE BOOSTER ASSEMBLY WILL BE REPLACED.