There are no specific mileage requirements for ball joints. It is recommended that you always check the ball joints on a periodic basis and replace them if worn out. There are many ball joints that can last for over 160k miles although speed bumps, potholes, and road salt during the winter months do take their toll. When not caught in time, the worn-out ball joints are capable of separating while driving. In case it separates, a vehicle will definitely lose control.