Hi, I currently have an N2 (upgraded to an N3) and I'm starting to have so many problems, from an intermittent source button, to a loud fan when cold to a screen that no longer pulls out, numerous DVD read errors, screen is black at times after opening up and so on, I was looking to replace the head unit and brain to an N4 unit. Does anyone know if the harnesses are interchangeable, I really don't want to rewire my whole vehicle, so if they were interchangeable it would be an easy swap, if they are not, I will just have my HU repaired. let me know what you know, thx in advance for your help.

 

Shhnappa