When replacing a o2 sensor. Do I replace the one before or after the cat? Also how often should it be replaced? Thanks.

 

depends on wich one needs to be replaced, one cost more then the other too. and you need a 02 socket other wise have fun getting it off, and wd40 is your best friend when do you swap them out

 

o2 socket? what does that look like and where can I get one at?

 

auto parts store, its a like your normal deep well socket but it has a section cut out so you can fit it over the wires, here this might help explain it more. i am also not sure what size you would need

http://www.daemione.com/breaker_bar.JPG

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by txracer &raquo;</TD></TR><TR><TD CLASS="quote">depends on wich one needs to be replaced, one cost more then the other too.</TD></TR></TABLE>

They're interchangeable. The only difference is the wiring (slightly longer and with a rubber grommet), due to the secondary O2's location. Pricing from Acura Automotive Parts is identical for the primary and secondary.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by txracer &raquo;</TD></TR><TR><TD CLASS="quote">you need a 02 socket other wise have fun getting it off, and wd40 is your best friend when do you swap them out</TD></TR></TABLE>

All you need is a 22mm wrench to remove and install the sensor. I'd recommend applying a small amount of anti-seize compound to the threads of the sensor before installing it, to make future remove easier.