34 21 320 Removing and installing or replacing both rear brake disks

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.

Necessary preliminary tasks:

Remove wheels, refer to 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL .
If necessary, remove and clean brake linings, refer to 34 11 000 REMOVING AND INSTALLING/REPLACING BRAKE LININGS ON BOTH FRONT DISK BRAKES

E65 and E66: Release parking brake (pushbutton to left of steering wheel).

After completing tasks, adjust handbrake. (Not for E65 and E66)! Refer to 34 10 014 ADJUSTING HANDBRAKE .

Observe safety instructions on raising the vehicle, refer to 00 .. ... LIFTING VEHICLE WITH A LIFTING PLATFORM .

IMPORTANT: If the thickness of the brake disks drops below the minimum brake disk thickness (MIN TH), then the brake disks must be replaced, refer to BRAKES - TECHNICAL DATA . Always replace brake disks in pairs. If the brake disks are replaced, you must also fit new brake linings.

Release screws (1), remove brake caliper and tie up.

Fig 1: Releasing Screws And Removing Brake Caliper (Rear Brake)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Brake hose remains connected.

Installation:

Tightening torque, refer to 34 21 3AZ in BRAKES - TIGHTENING TORQUES - 645CI .

Unscrew bolts and take off brake disk.

Fig 2: Releasing Bolts And Removing Brake Disk

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Tightening torque, refer to 34 21 1AZ in BRAKES - TIGHTENING TORQUES - 645CI .

Clean contact surface of brake disk at wheel hub thoroughly; remove traces of corrosion if necessary. Unevenness on contact surface may result in distortion of brake disk!

IMPORTANT: To release brake disk: Do not under any circumstances strike friction ring with a hammer or similar! If necessary, carefully tap on base of brake disk chamber with a rubber mallet.

IMPORTANT: Internally ventilated brake disks are balanced. Never remove or reposition balance clips.

Fig 3: Locating Balance Clip (Rear Brake)

Courtesy of BMW OF NORTH AMERICA, INC.