ABS Light: Description and Operation

PURPOSE
The Antilock Brake System (ABS) indicator lamp will alert the driver in the case of an ABS malfunction.

OPERATION
The ABS indicator lamp will illuminate after turning "On" the ignition and should extinguish again when the engine is started, if the ABS is okay. This procedure is repeated each time the ignition is turned "Off" and "On".

The ABS control unit will automatically switch to "normal braking" when there is an electric or electronic defect in the ABS. This means the car can still be braked, but without ABS control (the wheels could lock!).

Causes for erroneous indication (indicator lamp doesn't come "On", doesn't go "Out" or comes "On" while driving - even occasionally) can be found with the help of a BMW Service Tester or BMW compatible equipment and a brake test stand (dynamometer).