3421320 Removing and installing/renewing both brake discs

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 335xi, and 2010 BMW 335i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks

Remove WHEELS .
Remove and clean BRAKE PADS

Check minimum brake disc thickness:

Position special tool 34 1 280 Gauge at three measuring points in area (1) and measure.
Compare measurement result and lowest value with setpoint value. See REAR BRAKE .

If the brake discs are replaced, you must also fit new brake pads.

Always replace brake discs in pairs.

Fig 1: Check 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. See REAR BRAKE (MIN TH).

Release bolts (1) and detach brake anchor plate.

Installation:

Replace screws.

Tightening torque, see 34 21 REAR BRAKE .

Fig 2: Identifying Brake Anchor Plate Mounting Bolts

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, see 34 21 REAR BRAKE .

Fig 3: Identifying Brake Disc With Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

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