Expert: Don Berlan - 7/25/2006

Question
1994 bmw 318I abs light is lite not all the time and the car when stopping pulsates not all the time from front brakes , also have to pump brake peddle once and peddle will cope up Changed rotors and pads . Any suggestions?

Answer
You may hav a bad ABS sensor.The Sensor reads impulses from the trigger wheel on the wheel bearngs.The wheels often get rusty and the sensor is unable to get the readings.The light will go off when problem is found.
The pulsation may be coming from the rear and it also sounds as if you might have air in the system.Bleed the brakes to help eliminate the pulsation after checking rear brakes.