Is the wiring harness for the Bose amps in the 2009 G37x the same in the coupe as in the sedan. I'm trying to find the correct diagram to follow so I can add and / or bypass the factory system without losing the factory features.

 

Best advice? Go here: G37 Factory Shop Manuals
and download the AV Section of the FSM for the cars you want to compare. There are too many diagrams for me to post here.