Wheel Speed Sensor

Front wheel speed sensors are attached to steering knuckles. Rear wheel speed sensors are mounted over a toothed sensor ring. See Fig 1 or Fig 2 . 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: Front Wheel Speed Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 2: Rear Wheel Speed Sensor

Courtesy of GENERAL MOTORS CORP.