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

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read and comply with General Information See 34 00 ... GENERAL INFORMATION
Remove air duct from microfilter on left See 64 31 031 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT MICROFILTER AIR DUCT (AUTOMATIC A/C HIGH)

Observe safety when raising the vehicle.

IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in Bleeding brake system with DSC. See 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

Courtesy 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 With Collecting Tray To Bleeder Valve On Rear Right Brake Caliper

Courtesy 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

Courtesy of BMW OF NORTH AMERICA, INC.