Mitsubishi said in documents filed with the U.S. National Highway Traffic Safety Administration that a defective vacuum pump can stop working. That can reduce braking power, increase stopping distances and raise the risk of a crash.
Mitsubishi said no crashes or injuries have been reported.
The problem was discovered when the company got a complaint from a customer in Japan.
Mitsubishi will notify owners and replace the pumps free of charge. The company has not yet announced a schedule for the notification or repairs.