Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2004760LI (E66) V12-6.0L (N73)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIR
2004 BMW 760Li (E66) V12-6.0L (N73)
Engine Control Module: Service and Repair
2004 BMW 760Li (E66) V12-6.0L (N73)SECTION Service and Repair
12 14 550 - Replacing control units (Digital Motor Electronics N73)
Necessary preliminary tasks:
- Read fault memory.
- Switch off ignition.
- Follow instructions for disconnecting and connecting battery Instructions for Disconnecting and Connecting Battery.
- Disconnect battery.
- Remove right fresh air duct Removing and Installing/Replacing Left or Right Fresh-Air Duct (Automatic A/C High).
Caution!
- Observe removal and installation of electronic control units Service and Repair.
Observe following instructions before replacing control unit:
- Program control unit Programming Control Unit (DME/DDE).
- Code control unit Coding Control Module (DME/DDE).
Release screw and remove holder (1).
Release screws and remove cover (2) from control unit box.
Note:
Release screws on seal (3) only when removing wiring harness.
Installation Note:
Insert tabs (1) in openings (2) and close cover.
Unlock and detach plug connections on DME control unit (3).
Installation Note:
Plug color: black.
Unlock and disconnect plug-in connections on DME 2 control unit (2).
Installation Note:
Plug color: gray.
Add final details to vehicle.
Check function of DME.
RENDER: 1.0x
NO RELATED
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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.