34 21 745 Removing and Installing/Replacing Left or Right Rear Brake Caliper

34 21 745 Removing and installing/replacing left or right rear brake caliper





Necessary preliminary tasks:
^ Remove wheel
^ Read and comply with General Information.

After completing work: Bleed braking system





Press clutch pedal down to floor and secure with pedal support.

Note:
The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.





Important!
Grip brake hose at square head (2) so that connecting piece cannot rotate in retaining bracket.

Disconnect brake hose from brake line (1).

Installation:
Tightening torque 34 32 1AZ.





Detach brake hose (1) from brake caliper.

Installation:
Tightening torque 34 32 3AZ.

Important!
Never twist brake hose when installing it and avoid all contact with parts attached rigidly to the body.

Note:
First tighten brake hose on brake caliper.

If necessary, remove brake pad wear sensor.





Lift out retaining spring (1).





Remove cover plug (1).





Unscrew guide bolts (1).

Withdraw brake caliper backwards.

Installation:
Tightening torque 34 21 4AZ.

Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.





Important!
Mark any worn brake pads.
In the event of one-sided brake pad wear, do not change brake pads round.

Remove brake pads in direction of arrow.

If necessary, clean brake caliper and pads.