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Home >> BMW >> 2013 >> Z4 28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1327 (Brakes - Repair -- Z4_E89) >> Mechanical/Hydraulic Components >> 34 51 527 Removing and installing or replacing DSC hydraulic unit

34 51 527 Removing and installing or replacing DSC hydraulic unit

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks: 

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
G06908372Courtesy of BMW OF NORTH AMERICA, INC.

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
G06908373Courtesy of BMW OF NORTH AMERICA, INC.

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
G04726702Courtesy of BMW OF NORTH AMERICA, INC.

When replacing control unit: 

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