34 00 050 Bleeding brake system with DSC
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.
Connect bleeder unit with max. 2 bar filling pressure.
A second person is needed to help carry out this work.
Unclip retaining tabs (1).
Pull cover (3) out of guide (2) and remove.
Connect DIS.
Select path: Service functions - Chassis/Suspension - Traction control systems - Bleeding procedure.
Connect brake fluid changer to expansion tank and switch on.
Charging pressure should not exceed 2 bar.
Use only BMW-approved brake fluids. See BRAKES - OPERATING FLUIDS .
Fully rinse the brake system
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 vent valve.
Follow same procedure on rear left, front right and front left wheel brake.
Bleeding rear axle brake circuit
Connect bleeder hose with collecting tray to bleeder valve on rear right brake caliper.
Open vent valve.
Run bleeding routine with DIS with bleeder 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.
Bleeding front axle brake circuit
Connect bleeder hose with collecting tray to bleeder valve on front right brake caliper.
Open vent valve.
Run bleeding routine with DIS with bleeder 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.
Switch off brake fluid changer and remove from expansion tank.
Check brake fluid level.
Close expansion tank.