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34 00 025 Replacing Fluid In ABS/ASC+T Brake System

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Necessary Preliminary Tasks: 

Observe safety instructions on raising the vehicle. Refer to 00..... LIFTING VEHICLE WITH A LIFTING PLATFORM .

IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in 34 00 050 BLEEDING BRAKE SYSTEM WITH DSC .

Connect bleeder unit to expansion tank and switch on.

NOTE: Check relevant operating instructions for each device. Charging pressure should not exceed 2 bar.
Fig 1: Connecting Bleeder Unit To Expansion Tank
G03292533Courtesy of BMW OF NORTH AMERICA, INC.

Flushing Brake System Completely: 

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 bleed valve.

Follow same procedure on rear left, front right and front left wheel brake.

Fig 2: Connecting Bleeder Hose To Rear Right Brake Caliper
G03292534Courtesy of BMW OF NORTH AMERICA, INC.

Switch off bleeder unit and remove from expansion tank. Check brake fluid level.

Close expansion tank.

NOTE: Pay attention to rubber seal (1) in sealing cap.
Fig 3: Identifying Rubber Seal In Sealing Cap
G03292535Courtesy of BMW OF NORTH AMERICA, INC.