Rear

34 21 200 Removing and installing or replacing brake linings on both rear disk brakes

Special tools required:
^ 34 1 050
^ 34 1 080

Necessary preliminary tasks:
^ Remove wheels.

Observe safety instructions on raising the vehicle.
If necessary, when replacing linings, reset CBS display in accordance with factory specification.

Note: After completing work:
- Fully depress brake pedal several times so that brake linings contact brake disks.
- When installing new brake linings at front and rear axles, brake fluid level must be brought up to "MAX" marking.
- Hold ignition key for at least 30 seconds in position "1" without starting engine.
This clears a fault entry in the RAM
This prevents the brake wear indicator lamp from lighting up again.





Remove plastic plugs (1).
Right side:
Disconnect plug connection for brake lining wear sensor.
If necessary, replace brake lining wear sensor.





Release guide screws (2) with special tool 34 1 080.

Installation:
Only clean guide screws, do not grease.

Check threads.
Replace all guide screws which are not in perfect condition.
Tightening torque 35 Nm.






Lift out retaining spring (3).
Withdraw brake caliper backwards.





Turn piston fully back with special tool 34 1 050.

Important! When forcing piston back:

- Pay attention to brake fluid level in expansion tank, brake fluid that spills over will damage paintwork.





Remove outer brake lining. Inner brake lining is located with its spring in the piston.

Important! Mark any worn brake linings.

If the brake linings are worn on one side, they must not be mixed up!
New brake linings may only be installed if the brake disk thickness is greater than or equal to the minimum brake disk thickness (MIN TH).
refer to Technical Data.
Observe minimum brake disk thickness of brake linings.
refer to Technical Data.
Clean brake linings.
Do not apply grease to brake pad backplate.





Check dust sleeve (1) for damage and replace if necessary.
Clean contact face (2) of brake piston and apply a thin coating of anti-squeak compound.
Anti-squeak compound, refer to BMW Service Operating Fluids

Important! Dust sleeve must not come into contact with anti-squeak compound as this may cause the dust sleeve to swell.





Important! In E39/Touring models, make sure the insulating ring (1) is installed on the brake piston.





Clean mounting faces (1) and (2) of brake lining hammer heads/brake caliper housing and coat with anti-squeak compound.
Anti-squeak compound,
refer to BMW Service Operating Fluids





Clean contact face (3) of brake caliper and apply a thin coating of anti-squeak compound.
Anti-squeak compound, refer to BMW Service Operating Fluids





Clean brake caliper mounting bracket at hammer head guides and apply a thin coating of anti-squeak compound. Anti-squeak compound,
refer to BMW Service Operating Fluids