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

Special tools required: 

• 34 1 280  . See BRAKES - SPECIAL TOOLS .

Necessary preliminary tasks: 

• Remove wheels 
• If necessary,  remove and clean brake linings  

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

After completing work:

• Adjust  handbrake   (not for E65 and E66)
• Read and comply with notes on breaking in new brake discs /brake pads.  

Observe safety instructions on raising the vehicle.  See 00...... LIFTING VEHICLE WITH A LIFTING PLATFORM .

Check minimum brake disc thickness:

• Position special tool 34 1 280  at three measuring points in area (1) and measure.
• Compare measurement result and lowest value with setpoint value. 

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 BRAKES - TECHNICAL DATA .

Always replace brake discs in pairs.

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

Fig 1: Positioning Special Tool (34 1 280)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation: 

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

Fig 2: Identifying Brake Caliper, Tie Up And Screws

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!

Fig 3: Identifying Brake Disc Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 4: Locating Reposition Balance Clips

Courtesy of BMW OF NORTH AMERICA, INC.