34 00 050 Bleeding Brake System With DSC

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

E72 For:

WARNING: High-voltage system - danger to life!

E72 For:

WARNING: Compliance with the following points is mandatory before beginning work:

Observe safety instructions for handling hybrid cars

Necessary preliminary work:

IMPORTANT: When replacing or repairing, observe the filling and bleeding instructions for the following parts:

Tandem brake master cylinder
Hydraulic unit
Components and connecting lines which are fitted between these assemblies.
For E72: SBA control unit

Connect bleeder unit with max. 2 bar filling pressure.
A second person is needed to help carry out this work.

Use only BMW-approved brake fluids, see BRAKES - OPERATING FLUIDS .

Connect DIS.

Select path: Service functions - Chassis/Suspension - Traction control systems - Bleeding procedure.

IMPORTANT: Check relevant equipment manufacturer's operating instructions for each device.
Charging pressure should not exceed 2 bar.

Fig 1: Bleeding Brake System With DSC

Courtesy of BMW OF NORTH AMERICA, INC.

Connect brake fluid changer to expansion tank and switch on.

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.

Fig 2: Connecting Bleeder Hose With Collecting Tray To Bleeder Valve On Rear Right Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

Bleeding rear axle brake circuit

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

Close vent valve.

Run brake bleeding procedure with DIS with vent valve open.

After completing routine, press brake pedal 5 times to floor; clear and bubble-free brake fluid must flow out.

Close vent valve.

Repeat procedure at rear left.

Fig 3: Connecting Bleeder Hose With Collecting Tray To Bleeder Valve On Rear Right Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

Bleeding front axle brake circuit

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

Close vent valve.

Run brake bleeding procedure with DIS with vent valve open.

After completing routine, press brake pedal 5 times to floor, clear and bubble-free brake fluid must flow out.

Close vent valve.

Repeat procedure at front left.

Fig 4: Connecting Vent Hose With Collecting Vessel To Vent Valve On Front Right Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

Switch off brake fluid changer 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 rubber seal (1) in sealing cap.

Fig 5: Checking Brake Fluid Level

Courtesy of BMW OF NORTH AMERICA, INC.