Removing and installing/replacing left or right swivel bearing (M4 GTS)

Special tools required: 

• 31 2 230

Necessary preliminary work: 

• Remove FRONT WHEEL .
• Remove FRONT BRAKE DISC .

Removal: 

Left side only:

Slacken nut (1).

Remove jointed rod (2) from left wishbone.

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Release socket head cap screw (1).

Withdraw wheel speed sensor (2) from bore hole.

Attention! 

Check sensor head for damage and replace as necessary!

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Slacken nut (1).

• If necessary, hold on to the Torx socket.

Release track rod end (2) from swivel bearing.

Unscrew nut (3).

• If necessary, hold on to the Torx socket.

Release tension strut (4) from swivel bearing.

Slacken nut (5).

• If necessary, hold on to the Torx socket.

Release wishbone (6) from swivel bearing.

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Support swivel bearing with universal jack and suitable fixture.

Unscrew nuts (1).

Pull out screws (2) and remove holder (3).

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Spread the swivel bearing with two special tools 31 2 230 and pull out the swivel bearing from spring strut.

Installation note: 

Keep press fit of swivel bearing and spring strut in lower area clean and free from oil and grease.

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Installation: 

Replacement: 

• REMOUNT WHEEL BEARING .
• Remount BRAKE GUARD PLATE .

Align swivel bearing (2) and spring strut (1) to each other using the mark (3).

Slide swivel bearing (2) on the spring strut until the limit position is reached.

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Part  : Replace screws (2) and nuts (1).

Insert screws (2).

Mount holder (3).

Tighten down nuts (1).

Tightening torque 31 31 4AZ .

Installation note: 

Screw head must point in direction of travel.

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Clean bore for pulse sensor and lubricate with

Staburags NBU 12/K grease.

Insert pulse sensor (2) in bore hole.

Tighten hexagon socket screw (1).

Tightening torque 34 51 3AZ .

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Position wishbone (6) on swivel bearing.

Part  : Replace nut (5).

Tighten nut (5).

• If necessary, hold on to the Torx socket.

Tightening torque 31 12 4AZ .

Position tension strut (4) on swivel bearing.

Part  : Replace nut (3).

Tighten nut (3).

• If necessary, hold on to the Torx socket.

Tightening torque 31 12 2AZ .

Position track rod (1) on swivel bearing.

Part  : Replace nut (2).

Tighten nut (2).

• If necessary, hold on to the Torx socket.

Tightening torque 32 21 3AZ .

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Left side only:

Position jointed rod (2) of ride height sensor on wishbone.

Part  : Replace nut (1).

Tighten nut (1).

Tightening torque 37 14 4AZ .

Installation note: 

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

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Required follow-up work: 

• Install FRONT BRAKE DISC .
• Install FRONT WHEEL .
• Replacement: Perform wheel alignment. Refer to CARRY OUT KINEMATICS DIAGNOSIS SYSTEM WHEEL ALIGNMENT WITH VEHICLE LOAD UP TO DESIGN POSITION or KINEMATICS DIAGNOSIS SYSTEM WHEEL ALIGNMENT WITH RIDE HEIGHT MEASUREMENT WITHOUT LOADING THE VEHICLE .