34 51 527 Removing and installing or replacing DSC hydraulic unit

Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove left SUSPENSION CROSS-BRACE
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.

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

Disconnect plug connection (1).

Unfasten brake lines (2).

Installation:

Tightening torque 34 32 1AZ .

Fig 1: Identifying Plug Connection And Brake Lines

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Unclip holders (1) for water hoses.

Release screw (2).

Installation:

Tightening torque 34 51 6AZ .

Remove rear hydraulic control unit from holder and remove towards top.

IMPORTANT:

Brake lines must not be bent!

After completing work: BLEED BRAKING SYSTEM .

Fig 2: Identifying Water Hoses Screws And Holder

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When replacing hydraulic unit:

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

Installation:

Tightening torque 34 51 5AZ .

Modify DSC CONTROL UNIT .

Fig 3: Identifying Hydraulic Unit Convert Holder And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing control unit:

Carry out PROGRAMMING/CODING
ADJUSTMENT OF STEERING ANGLE SENSOR
Mix-up check of brake lines