Removing and installing/replacing master brake cylinder for DSC (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)

Special tools required:

32 1 270

Necessary preliminary work:

Read and comply with GENERAL NOTES .
Remove EXPANSION TANK .

IMPORTANT: Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake servo.

IMPORTANT: Do not bend brake lines.

Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Close off brake lines and brake master cylinder with seal plugs 32 1 270 .

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Release nuts (2) and feed brake master cylinder out of brake booster.

Installation note:

Replace self-locking nuts.

Tightening torque 34 31 1AZ .

Installation note:

Replace sealing ring.

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

When inserting the brake master cylinder (2) into the brake booster (1), make sure the pressure rod of the brake booster and that of the brake master cylinder meet each other on one level.

Courtesy of BMW OF NORTH AMERICA, INC.

After completing repair work:

Bleed BRAKE SYSTEM with DSC.