Left Or Right Front Brake Caliper: Reassembly

1. Coat cylinder bore, piston, dust sleeve and sealing ring with a light coat of brake cylinder paste.
2. Install sealing ring in rear annular groove of cylinder bore.
3. Install dust boot on piston. Ensure piston is not tilted when installing. Using wooden block, install piston and dust boot. See Fig 1.
4. Press brake lining fully outwards and insert spring (4). See Fig 2.
5. Only clean guide screws, do not grease. Check and replace if necessary. Tighten to specification. See TORQUE SPECIFICATIONS .
6. Install caliper. See CALIPER ASSEMBLY .

Fig 1: Pressing In Piston

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying Retaining Spring

Courtesy of BMW OF NORTH AMERICA, INC.