Necessary preliminary tasks

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Remove WHEELS .
Remove BRAKE PADS

After completing work:

Read and comply with notes on BRAKING 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 measurement result and lowest value with SETPOINT VALUE .

NOTE: If the brake discs are replaced, you must also fit new brake pads.
Always replace brake discs in pairs.

Fig 1: Positioning Special Tool (34 1 280) At Three Measuring Points

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). Detach brake caliper mounting bracket.
Installation:
Tightening torque 34 21 2AZ .

Fig 2: Identifying 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!

Fig 3: Identifying Brake Disc With Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Replace screw.

Tightening torque 34 21 1AZ .