Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Remove EXPANSION TANK .
Remove FOOTWELL TRIM .
Read and comply with GENERAL INFORMATION .

IMPORTANT: The brake booster must be slackened so that the brake master cylinder can be removed and installed without tilting!

Remove locking clip (1) and disengage and pull out locking pin.

Slacken nuts (2).

Installation:

Replace self-locking nuts.

Tightening torque 35 11 1AZ .

Fig 1: Identifying Locking Clip And Slacken Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not bend brake lines.

Unfasten brake lines (1).

Installation:

Tightening torque 34 32 1AZ .

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

If necessary, detach line (3) from hydraulic unit and press downwards slightly.

Installation:

Tightening torque 34 32 1AZ .

Fig 2: Removing Brake Master Cylinder From Brake Booster

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Replace self-locking nuts.

Tightening torque 34 31 1AZ .