34 11 220 Removing and installing/replacing both front brake discs

Special tools required:

Necessary preliminary tasks:

NOTE: After completing repair work, 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 measuring result and lowest value with SETPOINT VALUE .

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)

Courtesy of BMW OF NORTH AMERICA, INC.

Attention!

New brake pads may only be fitted if the brake disk thickness is greater than the MINIMUM BRAKE DISC THICKNESS .

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

Installation note:

Replace screws.

Tightening torque 34 11 2AZ .

Fig 2: Identifying Brake Caliper Support Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Attention!

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 Brake Disc And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note:

Replace screw.

Tightening torque 34 11 1AZ .