34 33 505 Removing And Installing/Replacing Brake Booster

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.

Necessary preliminary tasks:

Read and comply with General Information . See 34 00 ... GENERAL INFORMATION .
Remove equipment compartment bulkhead . See 51 71 085 REMOVING AND INSTALLING CENTER OF ASSEMBLY COMPARTMENT BULKHEAD .
Remove brake master cylinder . See 34 31 505 REMOVING AND INSTALLING / REPLACING MASTER BRAKE CYLINDER FOR DSC .
Removing non-return valve . See 34 33 071 REPLACING VACUUM HOSE FOR BRAKE BOOSTER (N62) .
Remove pedal trim . See 51 45 185 REMOVING AND INSTALLING/REPLACING TRIM FOR PEDAL ASSEMBLY .

Observe safety instructions on raising the vehicle. See 00 ... ... LIFTING VEHICLE WITH A LIFTING PLATFORM .

Detach retaining clip (1) on brake pedal.

IMPORTANT: Make sure retaining clip (1) is correctly seated.
If necessary, replace retaining clip (1).

Unscrew nuts (2).

Installation:

Replace self-locking nuts.

Tightening torque. See BRAKES - TIGHTENING TORQUES -- ALPINA .

Fig 1: Identifying Retaining Clip And Nuts

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Pull out pin (3).

Fig 2: Pulling Out Pin

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IMPORTANT: Do not use any force when removing and installing the brake unit; the brake unit can be damaged under certain circumstances.

Unclip brake lines from holder and carefully press to one side.

IMPORTANT: Brake lines must not be bent!

Carefully pull the brake unit out of the bulkhead swing it out.

Fig 3: Pulling Brake Unit Out Of Bulkhead

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Brake booster is highly sensitive to damage in area (3).

Such damage may cause the brake booster to malfunction.

Installation:

Install the adapter plate (1).

Replace the gasket (2) if necessary.

Fig 4: Identifying Adapter Plate And Gasket

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