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

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read and comply with GENERAL INSTRUCTIONS .
Remove the COWL PANEL COVER on the left.
Remove battery cover.
Extract brake fluid out of expansion tank.

IMPORTANT: Do not reuse drawn out brake fluid.

Removal:

Fig 1: Brake Fluid Switch Water Outlet

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Remove the water outlet (1).

Fig 2: Disconnecting Plug Connection Of Expansion Tank

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Unfasten plug connection (1) and disconnect.

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

Fig 3: Pulling Supply Hose Of Clutch Hydraulic System

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Release screw (1) and lift off expansion tank vertically in upward direction.

Fig 4: Lifting Expansion Tank

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Installation:

IMPORTANT: Check rubber plug in tandem brake master cylinder for damage and replace if necessary.

Fig 5: Pushing Expansion Tank Vertically Onto Tandem Brake Master Cylinder

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Push expansion tank (1) vertically onto the tandem brake master cylinder.

Fit fastening bolt and tighten.

Tightening torque 34 31 2AZ .

Fit supply hose (1) of clutch hydraulic system and push on to the expansion tank.

IMPORTANT: Make absolutely sure the supply hose is positioned correctly on the expansion tank!

Fig 6: Locating Supply Hose Of Clutch Hydraulic System

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Position plug connection (1) and snap into place.

Fig 7: Disconnecting Plug Connection Of Expansion Tank

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Fig 8: Brake Fluid Switch Water Outlet

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Install the water outlet (1).

Required follow-up work:

Top up brake fluid.