well if you are doing it yourself when you install the new one youll definitely need the harness/kit etc. But if you take it somewhere they will probably include that in the price of installation(which they may jack up the price of the kit). When we did it on my friends 01' civic there was a plastic piece that went around the whole radio and it popped out w/clips, and then the screws were behind that, see if yours is like that, if not it may be a lil diff.