34 31 181 Removing and Installing/Replacing Expansion Tank For Hydraulic Brake Actuation

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW 650i, 2009 BMW M6, 2009 BMW 650i, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove lower section of microfilter housing . See 64 31 061 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER HOUSING LOWER SECTION
Read and comply with General Information . See 34 00 ... GENERAL INFORMATION

Suck the brake fluid out of the expansion tank. Use suction bottle exclusively to draw off brake fluid.

IMPORTANT: Do not reuse drawn out brake fluid.

Fig 1: Sucking Brake Fluid Out Of Expansion Tank

G04742653

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Release retaining screw (2).

Installation:

Tightening torque 34 31 3AZ . See 34 31 BRAKE MASTER CYLINDER

Pull expansion tank vertically out of brake master cylinder.

Fig 2: Identifying Plug Connection & Retaining Screw

G04742654

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check rubber plug in brake master cylinder for damage and replace if necessary.

Push the expansion tank vertically onto the master brake cylinder.

Fig 3: Pushing Expansion Tank Vertically Onto Master Brake Cylinder

G04726651

Courtesy of BMW OF NORTH AMERICA, INC.