31 12 000 Removing and Installing/Replacing Left or Right Control Arm

31 12 000 Removing and installing/replacing left or right control arm





Note:
If the control arm is detached from the front axle carrier, it is necessary after reinstallation to carry out a wheel/chassis alignment check.





Necessary preliminary tasks:
Except M3:
^ Remove front wheel
^ Remove front underbody protection

Except M3:
If necessary, remove jointed rod of ride- height sensor from control arm.








M3 only:
Slacken nut (1).

Remove jointed rod (2) from control arm.

Installation:
Sensor lever (3) must point from ride-height sensor to left front wheel.

Tightening torque 37 14 3AZ.





Release nut (1); if necessary, grip at Torx socket (T40).

Installation:
Keep control arm to swivel bearing connection clean and free from oil and grease.

Replace self-locking nut.

Tightening torque 31 12 4AZ.

Slacken nut (1).

Remove screw towards front; if necessary remove bracket (2) with ride-height sensor.





Take off control arm.

Installation:
Screw head must point in direction of travel.

Replace self-locking nut.

Tighten down bolt connection in normal position.

Tightening torque 31 12 3AZ.





After installation:
^ Perform wheel/chassis alignment check
^ Carry out steering angle sensor adjustment/adjustment for active front steering

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31 12 080 Removing and installing/replacing both tension struts





Necessary preliminary tasks:
^ Except M3: Remove both front wheels
^ Remove front underbody protection





Release nut (1); if necessary, grip at Torx socket.

Installation:
Keep tension strut to swivel bearing connection clean and free from oil and grease.

Replace self-locking nut.

Tightening torque 31 12 2AZ.

Release bolt (1) and remove tension strut.

Raise locking nut (2) in area of bore and detach from front axle support.





Installation:
Replace locking nut.

Tighten bolt connection in normal position.

Tightening torque 31 12 1AZ.

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