Follow instructions for removing and installing electronic control units. Refer to 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS .

Before replacing the control module, always follow the instructions listed below:

Code control unit. Refer to 12 14 700 CODING CONTROL MODULE (DME/DDE) .
Program control unit. Refer to 12 14 705 PROGRAMMING CONTROL UNIT (DME/DDE) .

CAUTION: It is absolutely essential to read out the fault memory with the MoDiC or the BMW DIS and to create a fault memory printout.

Turn off ignition.

Release screws (1).

Remove cover.

Fig 1: Removing Cover

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Installation:

Correctly install wiring harness with grommet in cover (water tightness).

Hook cover (3) into hinges of underside of electronics box (1). Make sure upper stop (2) is correctly installed above hinges on underside of electronics box.

Fig 2: Locating Hinges Of Underside Of Electronics Box

Courtesy of BMW OF NORTH AMERICA, INC.

Assignment of electronics box (with automatic transmission):

= Control unit, Digital Motor Electronics (DME).
= Control unit for automatic transmission.

Fig 3: Identifying Control Units
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Disconnect plug connections (1).

Remove control unit (2).

Installation:

Replacement:

Observe equipment no. and coding.

Fig 4: View Of Plug Connections And Control Unit

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

12 14 550 Replacing Control Module (DME)

Use the Manual With the Right Hardware

When to See a Mechanic

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