There's a little something that's been on my mind for a good while now, so I figure I'd make a quick thread about it and see if anyone can shed some light on this for me. My 2004 has an auto dimming rear view mirror made by Donnelly with temperature and compass readouts. I know it's aftermarket, but I want to know how aftermarket. Were these rear view mirrors common as dealer installed add ons, or was this just a popular model mirror at the time for DIYers? The quality of the install on my mirror leads me to believe it was a DIY project by the previous owner since the wire that give it power is just stuck into the fuse box with a simple tap, but the fact that I've seen several other first gens with identical or very similar mirrors leads me to think it was a popular dealer add on at the time. My X was first sold at a Larry H Miller Nissan dealership in the Denver area if that means anything to anyone. Also, where does the mirror get its temperature reading from?