34 33 505 Removing and installing/replacing brake booster

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

For cars with S85 engines:

Remove vacuum pump
Remove bracket for vacuum pump
Remove vacuum line

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 Locking Clip And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Installation:

Replace seal between brake booster and bulkhead.

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

Fig 2: Identifying Non-Return Valve And Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.