uhh dont mean to sound sheisty but since pioneer is a piece of crap Ill tell u what I did. Ive done this with the n3 and d3 and prolly gonna do it again cuz after 2-3 months I all of a sudden have this accelerator whine and last time I replaced it, it worked fine. What I did was buy one from the store like best buy, circuit city. Very carefully, I peeled the serial sticker off of both of them. You might have to heat it up with a blow dryer if its kind of old. The new one should be easy. U then put the new serial on the old unit and voila u got yourself a new radio. I wouldnt normally te