Removing and installing/replacing tandem brake master cylinder (Cooper Convertible)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2021 MINI Cooper, 2020 MINI Cooper, 2019 MINI Cooper, 2018 MINI Cooper, and 2017 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 1 270

Preliminary work needed:

Read and comply with GENERAL INFORMATION .
Remove EXPANSION TANK .
Remove BATTERY .

Attention!

Before beginning the repair work, fully press the brake pedal several times to reduce the vacuum in the brake booster.

Attention!

Do not bend brake lines.

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

Unfasten brake lines (1).

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

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace sealing ring (1).

Check rubber plugs (2) and replace if necessary.

Courtesy of BMW OF NORTH AMERICA, INC.

When inserting the tandem brake master cylinder (1) into the brake booster, make sure the anti-roll bar link of the brake booster and the tandem brake master cylinder meet each other on one level.

Courtesy of BMW OF NORTH AMERICA, INC.

Insert nuts (2) and tighten.

Replace self-locking nuts.

Tightening torque 34 31 1AZ .

Insert brake lines (1) and tighten down.

Tightening torque 34 32 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install EXPANSION TANK .
Install BATTERY .
Vent the DSC BRAKE SYSTEM or replace the fluid in the BRAKE SYSTEM