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

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

Necessary preliminary tasks: 

After completing work:

Check minimum brake disc thickness:

NOTE: If the brake discs are replaced, you must also fit new brake pads.
Always replace brake discs in pairs.
Fig 1: Checking Brake Disc Thickness
G09849601Courtesy 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: 

Tightening torque 34 21 2AZ .

Fig 2: Detaching Brake Caliper Support
G06211794Courtesy 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!

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

Installation: 

Replace screw.

Tightening torque 34 21 1AZ .

Fig 3: Brake Disc And Screw
G09849685Courtesy of BMW OF NORTH AMERICA, INC.