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

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

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

Remove FRONT UNDERBODY PROTECTION

Remove jointed rod of ride-height sensor from control arm on right.

Fig 1: Locating Jointed Rod Of Ride-Height Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

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 .

Fig 2: Identifying Control Arm Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Release EAR CLAMP (1).

Move gaiter (2) from tie rod (3).

Installation:

Clean rack and check surface for damage (e.g. by corrosion).

Fig 3: Removing Gaiter From Tie Rod

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Tightening torque 31 12 3AZ .

Remove bolt (2) towards front.

Take off control arm.

Installation:

Screw head must point in direction of travel.

Replace self-locking nut.

Tighten down bolt connection in NORMAL POSITION .

Fig 4: Identifying Control Arm Bolt And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

Perform chassis alignment check See CHASSIS/WHEEL ALIGNMENT CHECK WITH VEHICLE LOAD UP TO DESIGN POSITION or CHASSIS/WHEEL ALIGNMENT CHECK WITH RIDE HEIGHT MEASUREMENT WITHOUT VEHICLE LOAD
Carry out STEERING ANGLE SENSOR ADJUSTMENT