31 12 004 Removing and installing/renewing left or right lower wishbone (M5)

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IMPORTANT: On vehicles manufactured up to 03/2013 It is imperative that the following instruction is followed:

Fig 1: Identifying Wishbone Part Number Location

Courtesy of BMW OF NORTH AMERICA, INC.

With wishbones manufactured up to 03/2013 both trailing arms and both lower wishbones must always be replaced together.

Due to a change in the stiffness of the rubber mounts in the lower wishbones and trailing arms, mixing old and new versions is not permissible .

If the trailing arms and wishbones have already been replaced as a complete unit previously, fitting a wishbone on its own is allowable again.

After completing installation, it is essential to ensure that the vehicle is programmed to integration level F010-13-03-500 or later.
If necessary, program the vehicle using ISTA/P 2.49.0 or later.

IMPORTANT:

If the lower wishbone is detached from the front axle support, it is necessary after installation to carry out a wheel alignment . See 32 00 150 KDS CHASSIS/WHEEL ALIGNMENT CHECK WITH VEHICLE LOAD UP TO DESIGN POSITION or 32 00 155 KDS WHEEL ALIGNMENT CHECK WITH RIDE HEIGHT MEASUREMENT WITHOUT VEHICLE LOAD .

Necessary preliminary tasks:

Remove FRONT WHEEL .
Remove COVER FROM THE STEERING BOX .

Release nut (3) and remove screw.

Tightening torque 31 12 7AZ .

Release spring strut (1) from wishbone (2).

Installation note:

Note direction of insertion of screw.

Replace screw and nut.

Tighten down screw connection in NORMAL POSITION .

Fig 2: Identifying Spring Strut, Wishbone And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and remove wishbone (2) from front axle support.

Tightening torque 31 12 3AZ .

Installation note:

Note direction of insertion of screw.

Replace screw and nut.

Tighten down screw connection in NORMAL POSITION .

Fig 3: Identifying Wishbone And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not release wishbone from swivel bearing with impact tool.
The swivel bearing must be removed if the steel bushing moves.
Rubber boot of wishbone must not be damaged!
Do not pull stainless steel ring off journal.

Release nut (1) and remove wishbone (2) from swivel bearing.

Tightening torque 31 12 4AZ .

Installation note:

Replace self-locking nut.

Keep wishbone to swivel bearing connection clean and free from oil and grease.

Fig 4: Identifying Swivel Bearing Wishbone With Nut

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Carry out wheel alignment procedure . See 32 00 150 KDS CHASSIS/WHEEL ALIGNMENT CHECK WITH VEHICLE LOAD UP TO DESIGN POSITION or 32 00 155 KDS WHEEL ALIGNMENT CHECK WITH RIDE HEIGHT MEASUREMENT WITHOUT VEHICLE LOAD .