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 .
Remove COVER FOR COWL PANEL ON LEFT .

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.

Unlock plug connection (1) and disconnect.

Pull off supply hose (2) on clutch hydraulic system.

Fig 1: Identifying Plug Connection And Supply Hose

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Release screw (1) and lift off expansion tank.

Installation:

Tightening torque 34 31 2AZ

Fig 2: Identifying Screw

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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: Identifying Rubber Plugs And Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.