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

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove wheels

Observe safety instructions on raising the vehicle. See 00...... LIFTING VEHICLE WITH A LIFTING PLATFORM .

After completing work: bleed brake system with DSC.

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.

Fig 1: Locating Pedal Support

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

Release screws (1).

Installation:

Tightening torque 34 21 3AZ. See 34 21 REAR BRAKE .

Disconnect brake hose (2).

Installation:

Tightening torque 34 32 5AZ. See 34 32 BRAKE LINES .

Unfasten brake hose at connection point to brake line.

Fig 2: Identifying Brake Hose And Screws

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Tightening torque 34 32 1AZ. See 34 32 BRAKE LINES .

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.