Mine was done before I got it, probably the worst aftermarket install ever done on one of these. they cut the original harness apart, wired only one speaker to the actual speaker, and put the switched +12v to the illumination circuit so the stereo came on when the headlights did... That was fun trying to get figured out. Now it's as good as it's going to get, works like anyone would expect a stereo to work. I did have to get a fuse tap for the ignition circuit, but I don't have a sunroof so there's no problems that could arise from there. IF you decide not to get an adapter harness or you cant find one to work with the head unit you purchase, I can post up the wiring diagrams to hook everything up properly and point you in the right direction BEFORE you cut into anything. Save you the headache I had to deal with.