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

Special tools required:

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.

NOTE: Checking control arm:

Refer to Measuring play of wheel control joints, see 31 12 023 Measuring play of wheel control joints .

Necessary preliminary tasks:

Release nut and remove bolt towards front.

Only on right side: If necessary, remove holder with ride-height sensor.

Installation:

Replace self-locking nut.

Tightening torque: 31 12 2AZ, see 31 12 CONTROL ARMS AND STRUTS .

Fig 1: Locating Self-Locking Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Release nut by only 3 thread turns so that control arm is not flung away unchecked when forced off.

Press control arm off swivel bearing with special tool 31 2 240 .

Unscrew nut and remove control arm.

Installation:

Keep journal on ball head and bushing in swivel bearing clean and free from oil and grease.

Replace self-locking nut.

Tightening torque: 31 12 6AZ, see 31 12 CONTROL ARMS AND STRUTS .

Fig 2: Special Tool (31 2 240)

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Perform chassis alignment check, see 32 00 ... CHASSIS/WHEEL ALIGNMENT CHECK PROCEDURE .
Carry out steering angle sensor adjustment