34 31 505 Removing and installing/replacing master brake cylinder for DSC

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Special tools required:

32 1 270

See BRAKES - SPECIAL TOOLS .

Necessary preliminary tasks:

Remove expansion tank .
Read and comply with GENERAL INFORMATION .

After completing tasks, brake system with DSC .

IMPORTANT: Do not bend brake lines.

Unfasten brake lines (2).

Unclip retaining bar (1) and remove both brake lines from guides.

Installation:

Tightening torque 34 32 1AZ . See 34 32 BRAKE LINES .

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

Fig 1: Removing Both Brake Lines From Guides

Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts (3) and feed brake master cylinder out of brake booster.

Installation:

Replace self-locking nuts.

Tightening torque 34 31 1AZ . See 34 31 BRAKE MASTER CYLINDER .

Installation:

Replace sealing ring.

Fig 2: Identifying Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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.

Fig 3: Inserting Brake Master Cylinder Into Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.