2012-2015 BMW 6 Series 4.4 Engine Bay Wiring Harness
Specifications
Donor year
2015
Fuel
Gas
Engine size
4.4 L
Engine code
N63TU
Engine type
4.4L V8 Twin-Turbo
Transmission
Automatic
Drivetrain
AWD
About this part
Also known as
Engine Wiring Harness
Motor Harness
Engine Bay Loom
Main Wiring Harness
Engine Cable Harness
Underhood Wiring Loom
ECU Wiring Harness
What this part does
The engine bay wiring harness acts as the central communication network for the engine compartment, linking the engine control module to critical sensors, fuel injectors, and ignition coils. It routes both power and data signals necessary to maintain correct air-fuel ratios, ignition timing, and overall engine management. Continual exposure to extreme heat and vibration can cause the insulation to become brittle or wires to break. When this fails, the vehicle will typically experience intermittent misfires, communication codes, sensor errors, or a complete failure to start.
Fits these vehicles
| Make | Model | Years | Engine |
|---|---|---|---|
| BMW | 650i xDrive | 2013-2015 | 4.4L V8 N63TU |
| BMW | 650i | 2013-2015 | 4.4L V8 N63TU |
| BMW | 550i xDrive | 2014-2016 | 4.4L V8 N63TU |
| BMW | 550i | 2014-2016 | 4.4L V8 N63TU |
Before you order
Because the 4.4L V8 Twin-Turbo generates substantial ambient heat, carefully inspect all plastic clips and sensor connectors upon arrival before routing the loom. Wiring configurations differ heavily depending on the exact equipment level; ensure your vehicle features the same AWD (xDrive) setup and N63TU engine generation as the vehicle it came from. Coding is not required for the harness itself, but any replacement modules attached to it may require initialization.
