34 31 181 Removing and installing/replacing expansion tank for hydraulic brake control (2' Series coupe and convertible, 2017-2021)

Necessary preliminary tasks:

Refer to READING AND COMPLYING WITH GENERAL INFORMATION .
Refer to REMOVING COVER in engine compartment, left.

Only on F80, F82, F83:

Remove tension strut on spring strut dome.

After completing repair work:

BLEEDING BRAKING SYSTEM .

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.

Pull off supply hose (1) of clutch hydraulic system if necessary.

Unfasten plug connection (2) and disconnect.

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Loosen the lock screw (1).

Installation note:

Tightening torque: 34 31 2AZ .

Pull expansion tank in direction of arrow vertically out of tandem brake master cylinder.

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

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