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Home >> BMW >> 2007 >> 335i 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Brakes - Repair - E90/E91) >> 33 brake booster >> 34 33 505 Removing and installing or replacing brake booster

34 33 505 Removing and installing or replacing brake booster

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Necessary preliminary tasks: 

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

Unscrew nuts (2).

Installation: 

Replace self-locking nuts.

For tightening torque refer to 35 11 1AZ.

Fig 1: Identifying Brake Booster Locking Clip And Nut
G04726652Courtesy of BMW OF NORTH AMERICA, INC.

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.

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.

The Non-Return Valve  must be modified when the brake booster is replaced.

Fig 2: Identifying Brake Booster
G04726671Courtesy of BMW OF NORTH AMERICA, INC.