34 21 320 Removing and installing or replacing both rear brake discs
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2015 BMW 750i, 2015 BMW 750Li, and 2015 BMW 740i. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary work:
- Remove WHEELS .
- Remove and clean BRAKE PADS
After completing repair work:
- Adjust PARKING BRAKE
- 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 note:
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!
Release screw (1) and remove brake disc (2).
Installation note:
Replace screw.
Tightening torque 34 21 1AZ .