Re: Head Unit Replacement
The factory Infiniti amp accepts speaker level inputs so you can swap in any aftermarket unit using the proper harness adapter that is available for about $20. You will also need an adapter that will mount a DIN radio in the factory din and a half hole which are anywhere between $7-15. You will also need the proper radio antenna adapter that is another $10 or so. As for steering wheel controls, I have no experience with those interfaces as my Columbia Edition does not have steering wheel controls.
I can swap the factory head for my Alpine unit in less than 10 minutes.
2004 Columbia Edition WJ 4.7 HO
RB4/Moog HD Steering Stabilizer/PML trans pan 10304/ Autometer trans temp and oil pressure gauge/UpCountry springs & OME 10MM Spacers/Bilstein shocks/Rubicon Moabs/255/65r17 Cooper Discoverer AT3/Factory chrome tow hooks/Mopar hitch & a loose nut behind the wheel