Replace hydraulic unit if sealing surface or contact lugs are damaged.
Carefully push control module (1) onto hydraulic unit (2). Make sure that solenoid coils do not tilt. See Fig 1 .
Housing edge of control module (1) must slide over extension on hydraulic unit (2). See Fig 2 .
Press control module onto hydraulic unit and screw in new screws (1+2) evenly (do not tighten down) until control module is resting evenly on hydraulic unit. Insert screws (3-6), do not tighten yet. Tighten screws (1-6) in specified sequence with torque wrench. See Fig 3 .
Tighten screws to specification. See TORQUE SPECIFICATIONS .
Position plug connection vertically on control module in order to avoid damaging pins.
After the control module has been installed, new control units must be coded. On cars equipped with DSC, it is also necessary to carry out an adjustment of the steering angle sensor with DIS (Diagnosis and Information System) under the menu item "Service functions".

Fig 1: Installing Control Module

Courtesy of BMW OF NORTH AMERICA, INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Abs/ASC+T/DSC Control Module (From 09/98): Installation