34 33 505 Removing and installing or replacing brake booster

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove BRAKE MASTER CYLINDER .
Remove HYDRAULIC UNIT .
Remove left FOOTWELL TRIM .

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

Unscrew nuts (2).

Installation:

Replace self-locking nuts.

Tightening torque 35 11 1AZ .

Fig 1: Identifying Brake Pedal Locking Clip And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

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

Carefully pull brake booster (1) out of bulkhead and tilt out.

If necessary, disengage brake line from holder on bulkhead and press slightly to one side.

Replacement:

Modify NON-RETURN VALVE .

Fig 2: Pulling Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.