Car shakes when brakes are applied. had brakes & rotors replaced at 50,000 miles. mechanic said rotors were too damaged to turn. after 6 months and 20,000 miles, the car is shaking again when braking. took back to mechanic, who checked the rotors and said they need to be turned. i own a 1998 mitsubishi diamante, and that car does not need the rotors replaced every time i replace the brake pads. my driving is mostly highway, so i don't use these brakes much. *jb