by Chinky420 » Wed Oct 21, 2009 2:22 pm
anywhere from a couple to a few hundred bucks (those specialty cali sensors were much more expensive than the fed-spec $60 denso O2 sensors...i wanna say the a/f sensor is like $240)
check autozone, make sure you look for A/F sensor and NOT oxygen sensor.
yeah, the more expensive one is the one you're looking for.
as far as labor costs, it shouldn't take a shop more than an hour to do (it's possible to do yourself, you'll need to get an offset oxygen sensor wrench-socket, which is also carried at autozone, and i think there's a DIY writeup in the tutorial section).