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

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove wheels, refer to 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL .

Observe safety instructions on raising the vehicle, refer to 00 .. ... LIFTING VEHICLE WITH A LIFTING PLATFORM .

After completing tasks, bleed brake system, refer to 34 00 025 REPLACING FLUID IN ABS/ASC+T 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.

Fig 1: Depressing Brake Pedal (Rear Brake)

Courtesy of BMW OF NORTH AMERICA, INC.

Right side: Disconnect plug connection for brake lining wear sensor.

Unfasten screws (1).

Installation:

Tightening torque, refer to 34 21 3AZ in BRAKES - TIGHTENING TORQUES - 645CI .

Release brake hose (2).

Installation:

Tightening torque, refer to 34 32 5AZ in BRAKES - TIGHTENING TORQUES - 645CI .

Unfasten brake hose at connection point to brake line.

Tightening torque, refer to 34 32 1AZ in BRAKES - TIGHTENING TORQUES - 645CI .

First tighten the brake hose on the brake cover, then tighten connection on brake line.

Install brake hose without torsional stress.

Pull off fist caliper towards rear of vehicle.

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.

Fig 2: Releasing Screws And Releasing Brake Hose

Courtesy of BMW OF NORTH AMERICA, INC.