37 12 220 Removing and installing / replacing rear active stabilizer

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

33 0 170

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 rear wheel

E64:

Remove rear cross strut

Release screws (1).

Installation:

Insert screws (1).

Align pressure lines to rear axle carrier.

Tighten down screws (1).

Tightening torque 8 N.m.

Fig 1: Releasing Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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 nuts (1) on both sides.

Remove stabilizer from rear axle carrier.

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.

Replace self-locking nut.

Tightening torque 28 N.m.

Fig 2: Releasing Nuts

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)!

Release nuts (1, 2).

Tightening torque 30 N.m.

Disconnect pressure lines and seal off with seal plugs.

Remove stabiliser links on both sides from stabilizer.

Remove stabilizer sideways.

Installation:

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

Fig 3: Disconnecting Pressure Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Assembly: Pressure lines to oscillating motor

NOTE: Before the stabilizer is installed, the pressure lines must be aligned to the oscillating motor and secured using banjo bolts.

Installation:

Screw nuts into stabilizer, do not tighten down
Attach special tool 33 0 170 to pressure lines (the side of the special tool illustrated must point in the direction of the oscillating motor)

Fig 4: Attaching Special Tool 33 0 170 To Pressure Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down nuts
Tightening torque 30 N.m.
Remove special tool

Replacement:

Remove rubber mount on both sides from stabilizer.

After installation:

Fill and bleed hydraulic system, refer to 32 13 006 BLEEDING POWER STEERING UNIT .
Check pipe connections for leaks
If necessary, carry out initial Dynamic Drive operation, refer to 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE .