I'm putting back together this 2003 G35 coupe, the steering wheel isn't there...there's a NRG hub for a racing steering wheel. So my question is two part I guess first I found a steering wheel but it's on a sedan and mine's a coupe are they interchangeable? It looks as if the wires and everything for the buttons on the original steering wheel we're not used for the hub but I'm not certain of that. How hard is it going to be to put in the infinity steering wheel back on?

 

Shouldn't be hard, those NRG kits are very common, yes the steering wheel is the same on coupe/sedan. I think it changed in 2005 or 2006 when they added bluetooth handsfree which added more buttons to some empty places on the steering wheel.

The wheel controls basically were dependent upon which package your car came with and I think they were all the same for 2003-2004.