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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 3025 (Brakes - Repair) >> Front Brakes >> 34 11 220 Removing and installing/replacing both front brake discs >> Necessary preliminary tasks

Necessary preliminary tasks

WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After completing work, read and comply with notes on BREAKING IN NEW BRAKE DISCS / BRAKE PADS .

Check minimum brake disc thickness:

NOTE: If the brake discs are replaced, you must also fit new brake pads.
Brake discs may only be replaced in pairs (on each axle).
Fig 1: Checking Minimum Brake Disc Thickness Using Special Tool (34 1 280)
G08528093Courtesy 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). Remove brake-caliper support.

Installation note: 

Tightening torque 34 11 2AZ .

Fig 2: Removing Brake-Caliper Support
G08528094Courtesy 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
G08528095Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note: 

Replace screw.

Tightening torque 34 11 1AZ .