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

Special tools required: 

• 34 1 280. See 34 1 280 SLIDING CALIPER

Necessary preliminary tasks: 

• Remove wheels. See 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL
• Remove and clean brake pads. See 34 21 200 Removing and Installing/Replacing Brake Linings On Both Rear Disc Brakes (Teves Floating Caliper) 

After completing work:

• Adjusting handbrake. 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 

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 DISCS E70

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 DISCS E70

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

Always replace brake discs in pairs.

Fig 1: Identifying Special Tool (34 1 280)

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and detach brake caliper mounting bracket.

Installation: 

Tightening torque 34 21 2AZ. See 34 21 REAR BRAKE DISCS E70 .

Fig 2: Removing Brake Caliper Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and remove brake disc (2).

Fig 3: Identifying Brake Disc Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Replace screw.

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