Front wheel speed sensor.
This is what the sensor looks like in the hub assembly (steering knuckle): 1 – speed sensor mounting ring; 2 – inner ring of the front hub bearing; 3 – front wheel speed sensor; 4 – wheel hub; 5 – steering knuckle
Hub bearing with sensor: 1 – magnetic bearing washer; 2 – speed sensor; 3 – hub bearing; 4 – speed sensor mounting ring
Removal
Jack up the car and place it on reliable stands, or place it on a two-post lift, apply the parking brake and turn off the ignition.
Remove the front wheel.
(Raise the vehicle to a height convenient for performing work).
Figure 21-2 - Removing the front wheel speed sensor: 1 - Speed sensor wiring harness mounting bracket; 2 - fender liner retainer; 3 - front wheel arch liner; 4 - front wheel speed sensor; 5 - bracket for fastening the speed sensor wiring harness to the front suspension strut; 6 - steering knuckle
Remove retainer 2, Figure 21-2, from the front wheel arch liner in the area where the speed sensor wiring harness is located (flat head screwdriver).
Note: For ease of work, you can remove the front fender liner (see here).
Remove the speed sensor wiring harness from the slots of bracket 5 of the front suspension strut and from the holder 1 on the engine compartment mudguard.
Remove the insulating foam 1, Figure 21-3, from the steering knuckle speed sensor mounting socket (not necessary).
Figure 21-3 - Removing the front wheel speed sensor: 1 - insulating foam material; 2 - front wheel speed sensor; 3 - retainer
Remove the 2nd speed sensor from the mounting hole on the steering knuckle by pressing the tab of the 3rd sensor retainer with a screwdriver (flat head screwdriver).
Disconnect the speed sensor wiring harness connector from the front wiring harness and remove the sensor.
Please note: The insulating foam material of the wheel speed sensor must be replaced.
Installation
Install the insulating foam into the speed sensor mounting groove on the steering knuckle.
Connect the speed sensor wiring harness connector to the wiring harness.
Install the speed sensor into the mounting hole on the steering knuckle until the locking latch engages.
Install the speed sensor wiring harness into the slots of the front suspension strut bracket and into the holder on the engine compartment mudguard.
Secure the front wheel arch liner with a clamp.
Install the front wheel.