34 33 505 Removing and installing or replacing brake booster

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Read and comply with GENERAL INFORMATION .
Remove left footwell trim . See 51 45 184 REMOVING AND INSTALLING/REPLACING TRIM PANEL FOR PEDAL ASSEMBLY (ECE ONLY) or 51 45 184 REMOVING AND INSTALLING/REPLACING TRIM PANEL FOR PEDAL ASSEMBLY (US ONLY) .
Remove BRAKE MASTER CYLINDER .
Remove WIPER MOUNTING BRACKET .

Detach retaining clip (1) on brake pedal.

Pull out locking pin.

Unscrew nuts (2).

Installation note:

Replace self-locking nuts.

Tightening torque 35 11 1AZ .

Fig 1: Identifying Retaining Clip On Brake Pedal With Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Release brake lines (1) from holder on bulkhead.

If necessary disconnect plug connection of vacuum sensor.

Pull vacuum line (2) out of brake booster.

Installation note:

Check gasket, replace if necessary.

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 (3) out of bulkhead and tilt out.

Fig 2: Releasing Brake Lines From Holder On Bulkhead

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Make sure seal (2) is present and correctly seated.

The protective film on the connection of the vacuum line must be removed when replacing the brake booster!

Fig 3: Identifying Protective Film On Connection Of Vacuum Line

Courtesy of BMW OF NORTH AMERICA, INC.