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Wheel sensor, rear (VIN: X3025752-)

Wheel sensor, rear (VIN: X3025752-)

To remove


1. Raise the car and remove the wheel.

2. Press back the brake piston with slip-joint pliers.


3. Remove the brake caliper and suspend it.

4. Back off the handbrake adjuster. It is accessible through a hole in the brake disc.


5. Remove the brake disc retaining bolt. Remove the brake disc.

6. Remove the air separator.


7. Remove the bolt securing the handbrake cable mounting.

8. Unplug the connector from the wheel sensor.

9. Detach the wheel sensor cable from the holder.

10. Remove the mounting for the wheel sensor cable and brake pipe (2 nuts).

11. Remove the wheel hub nuts. Use a long 15mm socket with 3/8 drive, part no. 30 34 444 and extension with ball fitting.

12. Remove the wheel hub from the disc back-plate. Let the disc back-plate and handbrake unit hang from the cable.


To fit


1. Clean the contact surfaces using a wire brush.

2. Fit the wheel hub on the back-plate and secure them to the longitudinal link using new nuts. Tighten the nuts alternately.

Tightening torque: 50 Nm +30° (40 lbf ft +30°).

3. Fit the brake disc.

Fit the lock screw with Loctite 242.

Tightening torque: 10 Nm (7 lbf ft).

4. Adjust the handbrake, see Adjusting handbrake shoes .


5. Fit the brake caliper. Use 74 96 268 Loctite 242 on the bolts.

Tightening torque: 80 Nm (59 lbf ft).

6. Fit the mounting for the wheel sensor cable and brake pipe.

Tightening torque: 24 Nm (18 lbf ft).


7. Fit the wheel sensor cable to the mounting.

8. Plug in the connector to the wheel sensor.


9. Fit the mounting for the handbrake cable.

Tightening torque: 8 Nm (6 lbf ft).

10. Fit the air separator.

11. Fit the wheel. See Wheels .

Tightening torques

aluminium rim 110 Nm (81 lbf ft)

pressed steel rim 50 Nm +2x90°, max. 110 Nm (37 lbf ft +2x90°, max. 81 lbf ft)

12. Lower the car to the floor.

13. Depress the brake pedal to press out the pistons in the brake calipers.