34 33 505 Removing and installing/replacing brake booster

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read and comply with General Information
Remove brake master cylinder

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 PEDAL ASSEMBLY CONSOLE .

Fig 1: Identifying Locking Clip And Locking Pin

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: Removing Non-Return Valve Of Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.