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

Special tools required

34 1 280

Necessary preliminary tasks

Remove WHEELS .
Remove and clean 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 .

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.

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 (2) with brake console (3) and tie back.

Installation:

Tightening torque 34 11 2AZ .

Check that brake hose is correctly seated in holder.

Fig 2: Identifying Brake Caliper With Brake Console And Screws

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!

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

Installation:

Replace screw.

Tightening torque 34 11 1AZ .

Fig 3: Identifying Brake Disc And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Read and comply with notes on BRAKING IN NEW BRAKE DISCS/BRAKE PADS .