Replacing Rear Brake Caliper
34 21 745 Removing and installing or replacing left or right rear brake caliperNecessary preliminary tasks:
^ Remove wheels.
^ Observe safety instructions on raising the vehicle.
After completing tasks, bleed brake system.
Apply pedal prop and depress brake pedal slightly. This prevents brake fluid from emerging from the expansion tank and air from entering the brake system when the brake lines are opened.
Unfasten screws (1).
Tightening torque 34 21 3AZ; Expansion tank to brake master cylinder 8+/- 2 Nm.
Release brake hose (2).
Tightening torque 34 32 5AZ; Brake hose to brake caliper, rear 24 +/- 2 Nm.
Unfasten brake hose on connection point to brake line.
Tightening torque 34 32 1AZ; Brake hose couplings 18 Nm.
Right side: Disconnect plug connection for brake lining wear sensor.
Pull off fist caliper towards rear of vehicle.
Installation:
Install brake hose without torsional stress.
First tighten the brake hose on the brake cover, then tighten connection on brake line.
Important! Check routing and securing of brake-pad-wear indicator cable. Check for correct securing with tab of dust cap. It is absolutely essential to prevent the cable on the rim from being scuffed.