Replacing fluid in brake system (M sport brake) (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)

NOTE: Read and comply with GENERAL INFORMATION .
The capacities are oil change QUANTITIES . For this purpose, refer to the BMW Parts Catalogue/Commercial Service Data (capacities) or the selected vehicle tab.

Necessary preliminary work:

Remove the left engine compartment COVER .

CAUTION: When carrying out repair work to the brake system, follow the procedure set out in BLEEDING BRAKE SYSTEM with DSC.
Use only BMW-APPROVED BRAKE FLUIDS , see QUANTITIES or use the selected vehicle tab.

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.

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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.

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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.

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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 .

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NOTE: The clutch slave cylinder must be scavenged in vehicles with manual gearbox.

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 seal (1) in sealing cap.

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