34 31 505 Removing and installing/replacing master brake cylinder for DSC

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 1 270

Necessary preliminary work:

Remove EXPANSION TANK .
Read and comply with GENERAL INFORMATION .

IMPORTANT: Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake servo.

IMPORTANT: Do not bend brake lines.

Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Close off brake lines and brake master cylinder with seal plugs 32 1 270 .

Release nuts (2) and feed brake master cylinder out of brake booster.

Installation note:

Replace self-locking nuts.

Tightening torque 34 31 1AZ .

Fig 1: Removing Brake Master Cylinder Out Of Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace sealing ring.

Fig 2: Identifying Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

When inserting the brake master cylinder (2) into the brake booster (1), make sure the pressure rod of the brake booster and that of the brake master cylinder meet each other on one level.

After installation:

Bleed BRAKE SYSTEM WITH DSC

Fig 3: Identifying Brake Master Cylinder And Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.