34 00 025 Replacing fluid in DSC 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 .

IMPORTANT: Do not reuse drawn out brake fluid.

Always use approved brake fluids, refer to OPERATING FLUIDS .

Release screw plug (1).

Remove cover (2).

Fig 1: Locating DSC Brake System Screws

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IMPORTANT:

To guarantee a correct bleed of the brake system, observe the following:

Top up the brake fluid in the expansion tank to the lower edge of the thread (1) with new brake fluid.
Bleed the hose of the bleeder unit before connecting.

Fig 2: Locating Lower Edge Of Expansion Tank Thread

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Connect bleeder unit (1) on expansion tank and switch on.

IMPORTANT:

Observe manufacturer's instructions for the respective equipment being utilized.

Charging pressure should not exceed 2 bar.

Fig 3: Locating Bleeder Unit Of Expansion Tank

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Fully flush the rear axle brake system.

Connect bleeder hose with collecting tray to bleeder valve on rear right brake caliper.

Open bleeder valve and purge until clear, bubble-free brake fluid emerges.

Close vent valve.

Carry out the same procedure on the rear left wheel brake.

Fig 4: Connecting Bleeder Hose To Bleeder Valve On Rear Brake Caliper

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Fully flush the front axle brake system.

Connect bleeder hose with collecting tray to bleeder valve on front right brake caliper.

Open bleeder valve and purge until clear, bubble-free brake fluid emerges.

Close vent valve.

Carry out the same procedure on the front left wheel brake.

Fig 5: Connecting Bleeder Hose To Bleeder Valve On Rear Brake Caliper

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NOTE: The clutch slave cylinder must be scavenged in cars with manual transmissions.

Fig 6: Locating Rubber Seal Of Sealing Cap

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Switch off bleeder unit and remove from expansion tank.

Check brake fluid level. If necessary, top up/draw off to maximum level.

Close expansion tank.

NOTE: Pay attention to rubber seal (1) in sealing cap.

Mount cover (2).

Lock screw plugs (1).

Fig 7: Locating DSC Brake System Screws

Courtesy of BMW OF NORTH AMERICA, INC.