34 33 505 Removing and installing/replacing brake booster

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.

Necessary preliminary tasks:

Read and comply with General Information, refer to 34 00 ... GENERAL INFORMATION .
Remove brake master cylinder, refer to 34 31 505 REMOVING AND INSTALLING / REPLACING MASTER BRAKE CYLINDER FOR DSC .

Detach locking clip (1) from brake pedal, disengage and pull out locking pin.

Release nuts (2).

Fig 1: Detaching Locking Clip From Brake Pedal

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace self-locking nuts. Tightening torque, refer to 35 11 1AZ in BRAKES - TIGHTENING TORQUES - 645CI .

Remove non-return valve (1) from brake booster. Carefully pull brake booster (2) out of bulkhead and tilt out.

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

Fig 2: Removing Non-Return From Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.