Front Wheel Speed Sensor: Description
WARNING: This page is about a different car, the 2002 Dodge Ram Wagon and 2002 Dodge Ram Van. However, it is still accessible from the selected car via links, so may be relevant.
The ABS brake system uses 3 wheel speed sensors. Two sensors are mounted to each front steering knuckle and the third sensor is mounted on the top of the rear axle differential housing.