34 51 527 Removing and installing/replacing DSC hydraulic unit

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. 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 See 6431062 REMOVING AND INSTALLING/REPLACING LEFT LOWER MICROFILTER HOUSING SECTION or 6431063 REMOVING AND INSTALLING/REPLACING RIGHT LOWER MICROFILTER HOUSING SECTION
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

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Unscrew nuts (1).

Installation note:

Tightening torque 34 51 6AZ .

Fig 2: Identifying Brake Lines Nuts

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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

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When replacing hydraulic unit

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

Installation note:

Tightening torque 34 51 5AZ .

Modify DSC CONTROL UNIT .

Fig 4: Identifying Hydraulic Unit Convert Holder And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing control unit

Carry out Vehicle programming and encoding
ADJUSTMENT OF STEERING ANGLE SENSOR
Brake line mix-up test: