Brake pedal pulses when applying brakes

Brake pedal pulses up and down when applying brakes. The problem is usually caused by the rotors being warped or out of true. As rotors age, they go through the heating and cooling process thousands of times, so it’s inevitable for them to lose their shape or trueness. If you do a lot of highway driving and you happen to be hard on your brakes, you will probably run into this problem many times in the life of your car.