Left Or Right Front Brake Caliper: Disassembly

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 BMW M5, 2003 BMW 540i, 2003 BMW 530i, 2003 BMW 525i, and 2002 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

Remove caliper. See CALIPER ASSEMBLY .
Remove pads from caliper. Remove caliper piston retaining ring (if equipped) and dust boot. Insert wooden block in caliper cavity. See Fig 1.
Slowly apply air pressure to fluid inlet of caliper to force out piston. To protect piston, place a protective plate (hard wood or hard felt) in caliper recess.
Check guide sleeves (5). See Fig 2. Fit new repair-kit guide sleeve if necessary.
Remove sealing ring carefully with a plastic needle. See Fig 3.
Thoroughly inspect cylinder bore, piston and flange surfaces. Machining of cylinders and pistons is not permitted.

Fig 1: Pressing Out Piston

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Locating Guide Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Removing Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.