BMW 7 Owners & Service Manuals
BMW 7 Series (F01/F02) 2008-2015 Service Manual / Brakes / Repair / Replacing Fluid In Brake System

BMW 7 Series: Replacing Fluid In Brake System

Necessary preliminary work

  • Remove left sensor opening
  • Read and comply with GENERAL INFORMATION.

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 fluids.

Connect bleeder unit to expansion tank and switch on.

NOTE: Follow the applicable machine manufacturer's operating instructions.

Charging pressure should not exceed 2 bar.

Brake Testing And Bleeding
Fig. 9: Connecting Bleeder Unit To Expansion Tank

Fully rinse the brake system

Connect vent hose with collecting vessel to vent valve on rear right brake caliper.

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

Close vent valve.

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

Brake Testing And Bleeding
Fig. 10: Locating Vent Valve On Rear Right Brake Caliper

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 gasket (1) in sealing cap.

Brake Testing And Bleeding
Fig. 11: Identifying Gasket And Brake Fluid Level


WARNING: If the engine hood/bonnet contact is pulled upwards (workshop mode), the information "switch closed" is output. The automatic engine start-stop function is active.

An automatic engine start is possible.

Observe safety precautions when working on MSA vehicles.

Before carrying out practical work on the engine, always ensure that the MSA functionality is deactivated so as to prevent automatic engine starting while work is being carried out in the engine compartment.

MSA function is deactivated by

  • Deactivate MSA by means of button (1) in passenger compartment
  • Open seat belt buckle and driver's door

Brake Testing And Bleeding
Fig. 12: Identifying MSA Button

  • Open engine bonnet/hood and ensure that engine hood/bonnet contact is not in workshop mode
    • Workshop mode
      A = 10 mm
    • Basic setting (engine hood/bonnet open)
      B = 7 mm

To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.

Brake Testing And Bleeding
Fig. 13: Identifying Engine Hood/Bonnet Contact Distance (Workshop Mode And Basic Setting)

When working with diagnosis tools

  • Observe instructions in diagnosis tool


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