34 31 500 Removing and installing/replacing brake master cylinder

WARNING: This page is about a different variant/trim than selected.

Special tools required:

32 1 270

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove EXPANSION TANK .

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

After completing tasks, bleed BRAKE SYSTEM WITH DSC .

IMPORTANT: Do not bend brake lines.
Close off brake lines and brake master cylinder with plugs 32 1 270.

Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ

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

Fig 1: Identifying Brake Lines And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace self-locking nuts.

Tightening torque 34 31 1AZ

Installation note:

Replace sealing ring (1).

Check rubber plugs (2) and replace if necessary.

Fig 2: Identifying Sealing Ring And Rubber Plugs

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

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

Fig 3: Identifying Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.