34 31 500 Removing and installing/replacing brake master cylinder

Special tools required:

32 1 270

Necessary preliminary work:

Remove EXPANSION TANK .
Remove HEATER END PANEL .
Read and comply with GENERAL BRAKE SERVICE INFORMATION .

After completing repair work, bleed BRAKE SYSTEM .

IMPORTANT: Do not bend brake lines.
Close off brake lines and brake master cylinder with seal 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 servo.

Fig 1: Releasing Brake Lines

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 servo, make sure the pressure rod of the brake servo and the brake master cylinder meet each other on one level.

Fig 3: Identifying Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.