Brake Caliper: Disassembly

With pads removed from caliper, remove retaining ring and dust boot. Using clamp, hold one piston in position, and insert wooden block in caliper cavity. Apply compressed air to fluid inlet to force out opposite piston. Repeat procedure for each piston. Remove piston seals without damaging caliper bore.

Fig 1: Disassembled View of 2-Piston Caliper Caliper is used as rear caliper on 528e, 535i, 635CSi and 735i models and front caliper on 318i and 325e models.