34 31 505 Removing and Installing/Replacing Master Brake Cylinder For DSC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 1 270

Necessary preliminary tasks:

Read and comply with General Information. See 34 00 ... GENERAL INFORMATION
Remove expansion tank. See 34 31 181 REMOVING AND INSTALLING/REPLACING EXPANSION TANK FOR HYDRAULIC BRAKE ACTUATION

Observe safety when raising the vehicle.

After completing tasks, bleed brake system. See 34 00 025 REPLACING FLUID IN ABS/ASC+T BRAKE SYSTEM

Unfasten brake lines.

Installation:

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

Seal off brake lines and brake master cylinder with special tool 32 1 270 (plug) . See 32 1 270 PLUGS (SET)

Fig 1: Locating Seal Off Brake Lines & Brake Master Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts and withdraw brake master cylinder from brake booster.

Installation:

Replace self-locking nuts.

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

Fig 2: Locating Brake Master Cylinder Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace O-ring.

Fig 3: Locating O-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 4: Identifying Brake Master Cylinder & Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.