my driver side one. They are located on the pre-cat section. From the passenger side, take the battery out and you should see it directly below. Check the Tech section, i think there's a write up for it. Get a O2 sensor removing socket and univeral joints. I tried to do it w.o the the socket, big mistake. The universal joints help you get in there better so you can get to it. Oh, need extension rods too.
