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Section 211 (Clutch - Repair): Bleeding

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2006 BMW X5, 2006 BMW X3, 2005 BMW X5, 2005 BMW X3, and 2005 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove transmission underbody protection if necessary. Remove micro filter housing as necessary. See CABIN AIR FILTERS - X3 , CABIN AIR FILTER - X5 or CABIN AIR FILTERS - 645Ci . Unfasten nuts and remove clutch slave cylinder (pressure line remains connected). See Fig 1. Fit special tool (21 5 030) on clutch slave cylinder (1). Press piston rod (2) with aid of spindle completely into clutch slave cylinder. See Fig 2. Connect bleeder unit to brake fluid expansion tank.
    NOTE: Check relevant operating instructions for each device.
  2. Charging pressure should not exceed 2 bar. Connect bleeder hose to bleeder valve (1). See Fig 3. Hold clutch slave cylinder in illustrated position with special tool (21 5 030). Open bleeder valve (1). If bubble-free brake fluid emerges, retract piston rod (2) of clutch slave cylinder with aid of spindle a little and press in again. If no air bubbles escape, close bleeder valve (1), otherwise repeat procedure.
  3. Do not under any circumstances remove special tool (21 5 030) from clutch slave cylinder when brake system is pressurized. Piston with push rod can jump out of clutch slave cylinder. Switch off bleeder unit or remove from brake fluid expansion tank.
  4. Slowly retract piston rod (2) of clutch slave cylinder (1) with special tool (21 5 030). See Fig 4. Remove special tool (21 5 030) from clutch slave cylinder (1). Fit clutch slave cylinder to transmission. See Fig 5. During installation, replace self-locking nuts. Correct brake fluid level in expansion tank with DOT 4 brake fluid.
Fig 1: Unfastening Nuts & Removing Clutch Slave Cylinder
G00386959Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Pressing Piston Rod With Aid Of Spindle Completely Into Clutch Slave Cylinder
G00386960Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Connecting Bleeder Hose To Bleeder Valve
G00386961Courtesy of BMW OF NORTH AMERICA, INC.
Fig 4: Slowly Retracting Piston Rod Of Clutch Slave Cylinder
G00386962Courtesy of BMW OF NORTH AMERICA, INC.
Fig 5: Installing Clutch Slave Cylinder To Transmission
G00386963Courtesy of BMW OF NORTH AMERICA, INC.
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