Check this on eBay:
Factory Nissan (single disc only) head unit AUX input adapter This is an expensive option,
and a custom harness could be made for much less. This gets asked frequently, and unfortunately your best bet is to get a GOOD FM transmitter to plug into your MP3 player. If you have an iPod, they have the best accessories. If you're like me and have something else (I have an RCA), then you might have to shop around more. Get one that offers more than just the 6 pre-programmed channels like some of them have. If you want to know about hardwiring some things for your MP3 player (power plug, audio connections, etc), let me know. :rolleyes: