I agree with Vette, its a matter of splicing like 8 wires and you can do it outside the car and just plug it into the factory harness. 100 bucks? I bought my dammm HU for my old car on ebay for that much, I strongly dislike bestbuy, especially when it comes to something like that. They F'd up my girlfriends install and now her rear defroster wont work.