| for parts google these: Courtsey Parts Import Parts Pro Speciality Z Z1 and tons more. Check the sponsors for this site also. O2 sensors are located in in your exhaust pipes. Passenger one is pretty easy to get to from the top, or you can put the car on jack stands and do both from the bottom. Takes 15 min. Buy an O2 socket from your local auto store if you dont have one. Heres a link to a post talking about them on an NA Z: [ http://www.twinturbo.net/nissan/300zx/forums/main/view/1119660/o2-sensor-replacement-na.html ] Search next time.
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