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

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. 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 COVER in engine compartment, left.

Only on F80, F82, F83:

Remove tension strut on spring strut dome.

After completing repair work:

BLEED 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.

Fig 1: Identifying Clutch Hydraulic System Supply Hose And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 2: Pulling Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 3: Pushing Expansion Tank Onto Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.