34 31 500 Removing and installing/replacing brake master cylinder

WARNING: This page is about a different car, the 2008 MINI Cooper, 2007 MINI Cooper, 2006 MINI Cooper, and 2005 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Necessary Preliminary Tasks:

General Information. Refer to 34 00 ... GENERAL INFORMATION .
Remove intake filter housing (R53).
Remove battery box (R50). Refer to 61 21 100 REMOVING AND INSTALLING/REPLACING BATTERY CONTAINER .
Remove right partition.
Remove expansion tank. Refer to 34 31 181 REPLACING EXPANSION TANK FOR HYDRAULIC BRAKE ACTUATION .

After completing tasks, bleed brake system. Refer to 34 00 048 BLEEDING BRAKE SYSTEM WITH ABS/ASC+T .

Unfasten brake lines (1).

Installation:

Tightening torque, (14 N.m.).

Release nuts (2) and withdraw brake master cylinder from brake booster.

Installation:

Replace self-locking nuts.

Tightening torque, (21 =/- 3 N.m.).

NOTE: For vehicles with DSC: Disconnect plug connection for pressure sensor.

Fig 1: Locating Brake Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace o-ring (1) and (2).

When brake master cylinder:

If the brake master cylinder is replaced in vehicles with DSC, the pressure sensor must be modified.

Fig 2: Identifying O-Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

When inserting master brake cylinder into brake booster, make sure pressure rod of brake booster and pressure rod of master brake cylinder are in one plane.

Fig 3: View Of Master Brake Cylinder And Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.