37 12 220 Removing And Installing / Replacing Rear Active Stabilizer

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Seal off pipe connections with plugs.

NOTE: A light film of grease on the anti-friction bearing in no way impairs the operational capability of the stabilizer.
In a warranty case you must always provide a fault memory printout, even where there is no fault memory entry, with the defective part.

Necessary preliminary tasks:

Remove complete rear axle carrier . See 33 31 000 REMOVING AND INSTALLING COMPLETE REAR AXLE CARRIER .

IMPORTANT: To prevent the stabilizer from being distorted, secure first the left retaining bracket ( without elongated holes) and then the right retaining bracket (with elongated holes) to the front axle carrier.

Release screws (1) on both sides.

Check anti-friction bearing on both sides for damage; if necessary, replace stabilizer (observe note at start of repair instruction).

Installation:

Check rubber mount on both sides , replace if necessary. See 33 55 021 REPLACING BOTH RUBBER MOUNTS FOR STABILIZER MOUNTING .

Tightening torque. See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES -- ALPINA .

Fig 1: Identifying Rear Active Stabilizer Screws

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage! Pressure lines must not have any contact with the stabilizer (minimum distance 5 mm)!

Carefully raise stabilizer (2) with a lever (1) until screw (3) is accessible.

Release nuts (3, 4).

Installation:

Pressure lines are protected against being mixed up by different thread diameters on the oscillating motor connection.

Tightening torque. See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES -- ALPINA .

Fig 2: Identifying Raise Stabilizer, Lever, Nuts And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Remove rubber mount on both sides from stabilizer . See 33 55 021 REPLACING BOTH RUBBER MOUNTS FOR STABILIZER MOUNTING .

After installation:

Version with ride-height control:
- Activate and fill air suspension system . See 37 00 100 DRAINING/FILLING AIR SPRING SYSTEM .
Fill and bleed hydraulic system . See 34 00 050 BLEEDING BRAKE SYSTEM WITH DSC .
Check pipe connections for leaks
If necessary, carry out initial Dynamic Drive operation . See 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE .
Adjust parking brake . See 34 41 006 ADJUSTING PARKING BRAKE .