34 33 505 Removing and installing or replacing brake booster

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Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove brake master cylinder .
Remove left footwell trim . See 51 45 185 REMOVING AND INSTALLING/REPLACING PANEL FOR PEDALS .

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 . See 35 11 000 REMOVING AND INSTALLING (REPLACING) COMPLETE BEARING BLOCK FOR FOOT PEDAL .

Fig 1: Detaching Locking Clip From Brake Pedal

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.

Remove non-return valve (1) from brake booster.

Carefully pull brake booster (2) out of bulkhead and tilt out.

If necessary, press brake lines to one side slightly.

Fig 2: Removing Non-Return Valve From Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.