I know it's been asked, and I know it's been "answered", but I was wondering if anyone had some more detailed information about the mechanics of why it's near impossible to install OEM navi in a non-navi TSX. See, here's my problem. I have a non-navi TSX. A friend of mine strips cars down for racing and recently gave me a brand new stock navi system with everything except the wire harness for obvious reasons for free. I spoke with my parts guy at my dealership and he said it's definitely possible, it would just be a problem getting a dealer to do it. I'm more than capable of doing minor electrical work on my car, however, from my understanding, the wire harness for navi runs through the firewall, etc. (makes no sense, just what the dealer told me). Any information aside from, it doesn't make sense or it's too costly, would be greatly appreciated. I love my TSX and it drives me crazy to have this navi system that apparently I can't use. Thanks in advance, from what I've read thus far you guys definitely know your stuff, way more than me.