34 52 516 Removing and installing/replacing DSC control unit

WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD protection).

Necessary preliminary tasks:

Remove HYDRAULIC CONTROL UNIT

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

Installation:

Tightening torque 34 51 4AZ .

Fig 1: Identifying Hydraulic Unit Screws And Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage to the contacts when removing and installing the hydraulic control unit.

Release screws (1) and carefully detach control unit (2) towards top.

Fig 2: Identifying Control Unit And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Cleaning with compressed air, chemical solvents and sharp-edged objects is not permitted.
Do not touch pressure sensor contacts (2) with your fingers or clean the contacts.

If necessary, clean sealing surface (1) with a plastic scraper or a fluff-free cloth.

Fig 3: Identifying Pressure Sensor Contacts And Sealing Surface

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not touch valve coils (1) and pressure sensor contact springs (2) with your fingers, do not clean or readjust these components either.

Check gasket (3) for damage. If damaged, replace DSC control unit (4).

Fig 4: Identifying Valve Coils, Pressure Sensor Contact Springs, Gasket And DSC Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Make sure screws are inserted evenly and DSC control unit rests on hydraulic control unit.

Replace screws.

Observe tightening sequence (1-4).

Tightening torque 34 51 1AZ .

Fig 5: DSC Control Unit Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Carry out PROGRAMMING/ENCODING
STEERING ANGLE SENSOR ADJUSTMENT
Brake line interchange check:
Function check of hydraulic control unit