Fits: 2006 BMW 325xi 2009-2012 BMW 328i xDrive 2007-2008 BMW 328xi 2006 BMW 330xi 2009-2010 BMW 335i xDrive 2007-2008 BMW 335xi WHAT IS AN ABS SENSOR ? The anti-lock braking system uses an ABS sensor or wheel sensor to monitor the wheel speed and send this information to the ABS computer. The ABS computer uses this information to prevent the brakes from locking during an emergency stop. If wheel speeds are not equal, the computer modulates the anti-lock feature until the speeds are equalized. .
