34 21 320 Removing and Installing or Replacing Both Rear Brake Discs

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

34 1 280

Necessary preliminary tasks:

Remove wheels See 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL
If necessary, remove and clean brake linings See 34 21 200 REMOVING AND INSTALLING OR REPLACING BRAKE LININGS ON BOTH REAR DISC BRAKES

E65 and E66: Release parking brake (push-button to left of steering wheel).

After completing work:

Adjust handbrake (not for E65 and E66) See 34 41 006 ADJUSTING PARKING BRAKE
Read and comply with notes on braking in new brake discs/brake pads . See 34 00 ... GENERAL INFORMATION ON BRAKING IN NEW BRAKE DISCS/BRAKE PADS

Observe safety when raising the vehicle.

Check minimum brake disc thickness:

Position special tool 34 1 280 at three measuring points in area (1) and measure. See 34 1 280 SLIDING CALIPER
Compare measurement result and lowest value with setpoint value. See 34 21 REAR BRAKE/DISK BRAKE E65

New brake linings may only be installed if the brake disc thickness is greater than or equal to the minimum brake disc thickness (MIN TH). See 34 21 REAR BRAKE/DISK BRAKE E65

Always replace brake discs in pairs.

If the brake discs are replaced, you must also fit new brake linings.

Fig 1: Identifying Special Tool (34 1 280)

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Brake hose remains connected.

Installation:

Tightening torque 34 21 3AZ. See 34 21 REAR BRAKE

Fig 2: Identifying Brake Caliper Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew bolts and take off brake disc.

Installation:

Tightening torque 34 21 1AZ. See 34 21 REAR BRAKE

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

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

Fig 3: Removing Traces Of Corrosion

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Internally ventilated brake discs are balanced.

Never remove or reposition balance clips.

Fig 4: Locating Reposition Balance Clips

Courtesy of BMW OF NORTH AMERICA, INC.