34 21 320 Removing and installing/replacing both rear brake discs (Brembo)
WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
- 34 1 280
See BRAKES - SPECIAL TOOLS .
Necessary preliminary tasks:
- Remove WHEELS
After completing work:
- Adjusting parking brake
- 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 . See BRAKES - TECHNICAL DATA .
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 installed if the brake disc thickness is greater than or equal to the minimum brake disc thickness
(MIN TH) (not incl. M vehicles). See BRAKES - TECHNICAL DATA
.
In the case of M vehicles and perforated brake discs, new brake pads may only be installed if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH). See BRAKES - TECHNICAL DATA .
In the case of M vehicles and perforated brake discs, new brake pads may only be installed if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH). See BRAKES - TECHNICAL DATA .
NOTE:
The minimum brake disc thickness is configured in such a way that it lasts the life of a further set of brake pads (does not apply to M vehicles and perforated brake discs).
Release bolts (1) and pull off brake caliper towards front.
IMPORTANT:
Tie brake caliper back and do not allow to hang from brake hose.
Installation:
Replace screws.
Tightening torque 34 21 2AZ, see 34 21 REAR BRAKE
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, see 34 21 REAR BRAKE