Autozone down here in texas has the downstream sensor for $69 (eg: after the pre cat on the exuast manifold, they are VERY easy to install if you rent the tool from them) and they have the upstream sensor for $64 (which is in the middle of everything, a real pain in the ass to get to, remove, and install). All in all, its one of the most innocent looking jobs ever, until you actually start doing the work. Get a friend to help you out, and remember - Never ever stop cussing at it, with enough sweat and cuss words, the old one will eventually get scared and fall out.
here\'s the topic about when i replaced my bank 2 upstream sensor. PM me if you have any questions.
