3451527 Removing and installing/replacing DSC hydraulic unit

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 335xi, and 2010 BMW 335i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work

Read and comply with GENERAL INFORMATION .
Remove LOWER SECTION OF MICROFILTER HOUSING
Extract brake fluid

NOTE: Extract brake fluid out of expansion tank. Use a suction bottle used exclusively for drawing off brake fluid.
Do not reuse drawn out brake fluid.

After completing work:

Bleed BRAKING SYSTEM

IMPORTANT: Do not mix up brake lines.
If necessary, mark before removal.
Close off connecting bores with seal plugs.

Press cover (2) slightly to one side and disconnect plug connection (1).

Unfasten brake lines (3).

Installation note:

Tightening torque 34 32 1AZ .

Fig 1: Identifying Brake Lines, Plug Connection And Cover

G04726699

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nuts (1).

Installation note:

Tightening torque 34 51 6AZ, see 34 51 SLIP CONTROL SYSTEM (DSC) .

Fig 2: Identifying Brake Lines Nuts

G04726700

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: If necessary, release brake lines from holder on bulkhead.
Brake lines must not be bent!

Tilt out hydraulic unit (1) in direction of side panel.

Fig 3: Tilting Hydraulic Unit Of Side Panel

G04726701

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing hydraulic unit:

Release screws (1) and convert holder (2).

Installation note:

Tightening torque, see 34 51 SLIP CONTROL SYSTEM (DSC) .

Modify DSC CONTROL UNIT .

Fig 4: Identifying Hydraulic Unit Convert Holder And Screws

G04726702

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing control unit:

Carry out rogramming/coding
ADJUSTMENT OF STEERING ANGLE SENSOR
Brake line mix-up test: