Flushing Brake System Completely

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

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 bleed valve.

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

Fig 1: Connecting Bleeder Hose With Collecting Tray To Bleeder Valve (ABS/ASC+T Brake System)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The clutch slave cylinder must also be scavenged in vehicles with manual transmissions.

Switch off brake fluid changer and remove from expansion tank. Check brake fluid level. Close expansion tank.

NOTE: Pay attention to rubber seal (1) in sealing cap.

Fig 2: Locating Rubber Seal In Sealing Cap (ABS/ASC+T Brake System)

Courtesy of BMW OF NORTH AMERICA, INC.