Disassembling and assem-
34 11 521
bling front brake caliper
Do not separate the brake caliper halves!
Integral ABS Drain front wheel circuit (
Remove the brake caliper.
Remove the brake pads.
Close the bleed screw.
Secure two opposing brake pistons with
spacer, BMW No. 34 1 520.
Insert a piece of cloth between the two brake pis-
tons not secured by the resetting tool.
Do not insert your fingers between the pistons; risk
Carefully press out brake pistons (1), using a
compressed air gun at the brake line connection.
Remove the two sealing rings from each brake
Inspect the brake caliper piston for hairline
cracks, score-marks and other damage.
Coat new sealing rings (2, 3) with brake fluid and
Coat brake caliper pistons (1) with brake fluid
Keep the brake pistons parallel with their bores
Remove and install the other two brake pistons
in the same way.
Using piston resetting tool, BMW No. 34 1 531,
press the pistons fully back.
Install brake caliper.
Integral ABS Fill and bleed front wheel circuit
Bleed screw to brake caliper .......................... 7 Nm
Grub screw in front brake caliper ................... 7 Nm
Brake pads/brake calipers ..............................white
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