Astro, Safari 1997-2005

Wheel Speed Sensor Rotors (Toothed Rings)


Removal & Installation

The front wheel speed sensors are replaceable only as part of the wheel hub and bearing assemblies. Any imperfections in the toothed ring, such as a missing or damaged tooth, can cause an inaccurate WSS signal.

4wd Vehicles

There are two basic styles of front wheel sensor, integral and non-integral. The integral sensor is mounted in the hub bearing assembly, while the non-integral is mounted on the backing plate.