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

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

Important! The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

Necessary preliminary tasks: Remove WHEEL . Read and comply with General Information . After completing work: bleed brake 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.

Fig 1: Identifying Brake Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

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 from brake caliper (3). Installation : Tightening torque 34 32 3AZ .

Fig 2: Identifying Brake Hose From Brake Line And Square Head

Courtesy of BMW OF NORTH AMERICA, INC.

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. Insert brake hose in bracket and screw onto brake pipe.

Release screws (1). Remove brake caliper (2) by pulling forward. Installation: Tightening torque 34 21 2AZ .

Fig 3: Locating Brake Caliper Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: Remove brake pads