Replacing wheel speed sensors (Opel Astra J)

You will need: tORX T30 key, flat-blade screwdriver.

Rotation speed sensor front wheel installed in the hole of the front suspension steering knuckle. To replace it, perform the following operations.

1. Disconnect the wire from the negative terminal of the battery.

2. Remove the front wheel (see Wheel replacement).

2. Remove the front wheel (see Wheel replacement).

3. Remove the front wheel speed sensor wire harness holder from the hole in the front suspension subframe.

4. Press the locking tab of the wiring harness connector to the sensor, installed on the front suspension subframe…

5. …and disconnect the vehicle wiring harness connector from the sensor harness connector.

6. Using a screwdriver, pry up the sensor wiring harness connector and disconnect it from the subframe.

7. Unscrew the bolt securing the sensor to the steering knuckle…

Note: For clarity, shown with the caliper and brake disc of the front wheel brake mechanism removed. To replace the sensor, these components do not need to be removed.

Note: For clarity, shown with the caliper and brake disc of the front wheel brake mechanism…

8. …and remove the sensor from the knuckle hole.

9. Pry it off with a screwdriver..

10. …disconnect the sensor wiring harness holder from the steering knuckle.

11. Using a screwdriver, pry off the covers of the two holders of the sensor wire harness on the front suspension arm…

12. …open the lids…

13. …remove the wire harness from the holders…

14. …and remove the sensor.

15. Install the front wheel speed sensor in the reverse order of removal.

Rotation speed sensor rear wheel installed in the hole of the flange of the rear suspension beam. To replace it, perform the following operations.

1. Disconnect the wire from the negative terminal of the battery.

2. Engage 1st gear and place chocks under the front wheels.

3. Raise the rear of the vehicle, place it on a secure support and remove the rear wheel.