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

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 BMW 760Li, 2015 BMW 760Li, 2014 BMW 760Li, 2013 BMW 760Li, and 2012 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove WHEELS .
Remove and clean BRAKE PADS

After completing repair work:

Adjust PARKING BRAKE (not F10, F11, F12, F13, F18, F25)
Read and comply with notes on BREAKING 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.
Compare measurement result and lowest value with SETPOINT VALUE .

NOTE: If the brake discs are replaced, you must also fit new brake pads.
Always replace brake discs in pairs.

Fig 1: Checking Minimum Brake Disc Thickness

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: New brake pads may only be fitted if the brake disc thickness is greater than the MINIMUM BRAKE DISC THICKNESS (MIN TH) .

Release screws (1). Detach brake-caliper support.

Installation note:

Tightening torque: see 2AZ in 34 21 REAR BRAKE .

Fig 2: Locating Screws Of Brake-Caliper Support

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Screw And Brake Disc

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note:

Replace screw.

Tightening torque: see 1AZ in 34 21 REAR BRAKE .