Wheel Speed Sensor

Wheel speed sensor is attached to steering knuckle on front wheels and on rear suspension knuckles on rear wheels, and consists of a sensor and a toothed sensor ring. See Fig 1 . Air gap is not adjustable and sensor is not repairable. Front outside drive axle or rear hub and bearing assembly must be replaced if sensor ring is damaged.

Fig 1: Identifying Front Wheel Speed Sensor

Courtesy of GENERAL MOTORS CORP.