34 21 320 Removing and installing or replacing both rear brake discs
WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
- 34 1 280
Necessary preliminary tasks:
- Remove WHEELS .
- Remove REAR BRAKE PADS
After completing 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 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.
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 .
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!
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 21 1AZ .