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Home >> Mini >> 2010 >> Cooper S, 2D Hatchback, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 3216 (Brakes - Repair) >> Rear Brakes >> 34 21 320 Removing and installing or replacing both rear brake discs >> Necessary preliminary tasks

Necessary preliminary tasks

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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 Minimum Brake Disc Thickness Using Special Tool (34 1 280)
G08528121Courtesy 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: Disconnecting Brake Caliper Support Mounting Screws
G08528122Courtesy 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
G08528123Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation: 

Replace screw.

Tightening torque 34 21 1AZ .