34 00 027 Replacing fluid in brake system (M sport brake)

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.

NOTE: READ AND COMPLY WITH GENERAL INFORMATION .
See BRAKES - OPERATING FLUIDS .

Necessary preliminary work:

Remove the left ENGINE COMPARTMENT COVER .

IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in BLEEDING BRAKE SYSTEM WITH DSC .
Use only BMW-approved BRAKE FLUID .

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

NOTE: Follow the applicable machine manufacturer's operating instructions.
Charging pressure should not exceed 2 bar.

Fig 1: Identifying Brake System Expansion Tank

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Completely flush brake system, rear.

Connect tank ventilation line (1) with collecting vessel to vent 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 2: Identifying Vent Hose

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Completely flush brake system, front right outer.

Connect tank ventilation line (1) with collecting vessel to vent valve on front right outer brake caliper.

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

Close vent valve.

Fig 3: Identifying Brake System Tank Ventilation Line

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Completely flush brake system, front right inner.

Connect tank ventilation line (1) with collecting vessel to vent valve on front right inner 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 4: Identifying Brake System Tank Ventilation Line

Courtesy of BMW OF NORTH AMERICA, INC.

Switch off bleeder unit and remove from expansion tank.

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

Close expansion tank.

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

Fig 5: Locating Brake Fluid Level Marking (Max)

Courtesy of BMW OF NORTH AMERICA, INC.