34 31 181 Removing And Installing/Replacing Expansion Tank For Hydraulic Brake Control

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove LEFT MICROFILTER HOUSING COVER
Vehicles with optional equipment 106 or 109, remove expansion tank reinforcement.

NOTE: Extract brake fluid out of expansion tank. Use a suction bottle used exclusively for drawing off brake fluid.
Do not reuse drawn out brake fluid.

Unfasten plug connection (1) and disconnect.

Remove wiring harness from holder (2).

Release screw (3) and lift off expansion tank vertically in upward direction.

Fig 1: Plug Connection, Holder And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Check rubber plug in brake master cylinder for damage and replace if necessary.
Push the expansion tank vertically onto the master brake cylinder.

Fig 2: Pushing Rubber Plug In Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.