37 12 220 Removing And Installing/Replacing Rear Active Stabilizer

WARNING: This page is about a different car, the 2007 BMW 550i and 2006 BMW 550i. 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:

E61: Remove rear cross strut

Release screws (1).

Installation:

Insert screws (1).

Align pressure lines to rear axle carrier.

Tighten down screws (1).

Tightening torque 37 14 14AZ . See 14 ELECTRICAL COMPONENTS for specs.

Fig 1: Identifying 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.

E61: If necessary, remove vibration damper from right retaining bracket of stabilizer.

Tightening torque 33 55 6AZ . See 55 STABILISER BAR for specs.

Release nuts (1) on both sides.

Remove stabilizer from front axle carrier.

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

Installation:

Fig 2: Identifying Nuts On Both Sides

Courtesy of BMW OF NORTH AMERICA, INC.

Check RUBBER MOUNT ON BOTH SIDES , replace if necessary.

Replace self-locking nut.

Tightening torque 33 55 3AZ . See 55 STABILISER BAR for specs.

IMPORTANT:

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

Release nuts (1, 2).

Tightening torque 37 14 18AZ . See 14 ELECTRICAL COMPONENTS for specs.

Disconnect pressure lines and seal off with seal plugs.

Remove STABILIZER LINKS ON BOTH SIDES FROM STABILIZER .

Remove stabilizer sideways.

Installation:

Fig 3: Identifying Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

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

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)
Tighten down nuts
Tightening torque 37 14 18AZ . See 14 ELECTRICAL COMPONENTS for specs.
Remove special tool

Fig 4: Identifying Special Tool (33 0 170)
Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Remove RUBBER MOUNT ON BOTH SIDES FROM STABILIZER .

After installation:

Fill and bleed HYDRAULIC SYSTEM
Check pipe connections for leaks
If necessary, carry out initial DYNAMIC DRIVE operation