34 31 181 Removing and installing / replacing expansion tank for hydraulic brake actuation

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Read and comply with General Information. See 34 00... General Information and 34 00... General information on braking in new brake discs / brake pads .
Remove cover for cowl panel on left. See 51 13 123 REMOVING AND INSTALLING/REPLACING LEFT COWL PANEL COVER .

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.

Pull off supply hose (2) on clutch hydraulics.

Fig 1: Identifying Plug Connection And Supply Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and lift off expansion tank.

Installation:

Tightening torque. See 34 31 2AZ.

Fig 2: Identifying Expansion Tank And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Check rubber plugs (1) in brake master cylinder for damage and replace if necessary.
Press expansion tank (2) vertically onto brake master cylinder.

Fig 3: Checking Rubber Plugs In Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.