Engine Control Module: Service and Repair

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12 14 550 Replace the control unit (DME) (N12, N14, N16, N18)







Necessary preliminary work:
- Switch off ignition.
- Clamp off battery.

IMPORTANT: Follow notes for removing and installing electronic control units.







IMPORTANT: It is absolutely essential to read out the fault memory with the MINI diagnosis system and create a fault memory printout.

Switch off ignition.







IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).







Replacement:
- Carry out programming/encoding.

NOTE:
- Connect diagnosis system.
- Read fault memory.
- Check stored error/fault messages.
- Rectify fault.
- Delete fault memory.







Version 1:
Unlock and remove cover (1).







Type 2:
Release screw (1) at side.
Unlock clamps and remove cover.







Unlock connector (1) and remove.







Press locks in direction of arrow and remove control unit (2) towards top.
Locks are accessible through bore holes (1).







NOTE:
- Reassemble the vehicle.
- Check stored fault messages.
- Delete fault memory.
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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.