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VEHICLES WITH DSC 5.7 OR DSC3 FROM 09/96, 750i/iL To 09/98

WARNING: This page does not describe the selected car, but rather 92 other vehicles, including the 2002 BMW Z3, 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW Z3, and 2001 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

Perform the following filling and bleeding procedure when exchanging or repairing tandem-brake master cylinder, hydraulic control unit DSC3 and components, or connecting lines installed between these units. When carrying out any other work on the brake system (e.g. replacing brake calipers), see BASIC BLEEDING PROCEDURES .

After working on the pre-boost pump, it is only necessary to bleed the front axle circuit. Here, before flushing the brake system, activate the pre-boost pump with the diagnosis and information system (DIS). Bleeding unit is connected with maximum 29 PSI (2 bar) filling pressure.

  1. Connect BMW Diagnosis and Information System (DIS).
  2. Call up service function Bleeding ABS/DSC3 Hydraulics.
    3. NOTE: Check relevant operating instructions for each device.
  3. Connect bleeding unit to expansion tank and switch on.
  4. Flush entire braking system.
    • Connect bleeder hose with container to bleed valve on rear right brake caliper.
    • Open bleed valve and flush until clear, bubble-free brake fluid emerges.
    • Close bleeder valve.
    • Follow same procedure on wheel brakes rear left, front right and front left in that order.
  5. Bleed front or rear-axle brake circuit
    • Connect bleeder hose with container to bleed valve on right brake caliper.
    • Open bleed valve.
    • Run bleeding routine with BMW Diagnosis and Information System (DIS) with bleeder valve open.
    • After running routine, press brake pedal 5 times to stop. Clear, bubble-free brake fluid must flow out.
    • Close bleeder valve.
    • Repeat procedure at left caliper.
  6. Switch off bleeder unit and disconnect from expansion tank.
  7. Check brake fluid level.
    8. NOTE: Take care of rubber gasket in lid.
  8. Close expansion tank.
  9. After completing work, a final inspection must be carried out with the Diagnosis and Information System (DIS) under the menu item "Service function."
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