31 21 090 Replacing left/right swivel bearing

Special tools required:

31 2 230

NOTE: When replacing swivel bearing pay attention to camber correction swivel bearings.

Camber correction swivel bearing are used to correct the camber values by ±30 minutes. To be used only if the camber tolerance values are exceeded and undershot.

IMPORTANT: On the M135i and M235i the camber correction of -30 min for the swivel bearing is standard status for production vehicles.

Identification is made at the PART NUMBER ON SWIVEL BEARING .

Fig 1: Identifying Swivel Bearing Part Number

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Necessary preliminary tasks:

Remove brake disc . See 34 11 220 REMOVING AND INSTALLING/REPLACING BOTH FRONT BRAKE DISCS or 34 11 220 REMOVING AND INSTALLING/REPLACING BOTH FRONT BRAKE DISCS (BREMBO) .
Remove PULSE SENSOR FROM SWIVEL BEARING .

IMPORTANT: Prior to installation, check sensor head and cable from pulse sensor and renew if necessary.

Only on ride-height sensor at left:

Release link at wishbone.

Fig 2: Locating Wishbone Link

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Slacken WISHBONE BOLT CONNECTION ON FRONT AXLE SUPPORT in order to prevent wishbone rubber mount from being damaged.

Remove WISHBONE FROM SWIVEL BEARING .

Remove TRACK ROD END FROM SWIVEL BEARING .

Remove TENSION STRUT FROM SWIVEL BEARING

Support swivel bearing with workshop jack and suitable fixture.

Slacken nut (1).

Tightening torque: 31 31 3AZ .

Take off holder (2).

Pull out screw.

Installation note:

Replace nut (1).

Bolt head points in direction of travel.

Fig 3: Removing Holder

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Expand swivel bearing with special tool 31 2 230 .

Lower workshop jack and remove swivel bearing.

Installation note:

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

Fig 4: Releasing Wheel Bearing Screw Connection

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Installation note:

Expand swivel bearing with special tool 31 2 230 .

Alight gap on swivel bearing (1) to positioning pin (2) on spring strut.

Slide on swivel bearing to limit position.

Fig 5: Aligning Swivel Bearing

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Remount WHEEL BEARING or replace if necessary.
Remount BRAKE GUARD PLATE or replace if necessary.

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 .