around $1000 us
four
you take it to the people to fix it.
And they are expensive to replace... (i replaced one @ $400)
its screwed into the exhaust manifold,undo wire and unscrew at manifold.
You need to take a wrench to loosen the oxygen sensor, then you will need to disconnect the cord. Once you have done that you will then pull out the old oxygen sensor.
wich one it has two one on the manifold and the other one on the exhaust pipe
wich one it has two one on the manifold and the other one on the exhaust pipe
It is very easy to find. It is at cat. inlet. you can see it from the top when you open the hood.
One can replace the oxygen sensors in a Volvo S80 by them selves by utilizing the help of a Chiltons manual on Volvo S80s. The faster route though more expensive, would be to enlist the help of a certified Volvo mechanic.
Assuming you have the V-6 engine, it has two downstream (after the cats) O2 sensors and two upstream (before the cats) Air/Fuel Ratio Sensors. So the answer to your question is two O2 sensors.
On Asian cars, bank one is the passenger side and bank two is the driver side. (Japanese drive on the right side of the road.) 2000 V6 Xterra should only have three oxygen sensors (two front, one rear) but later models should have four. Verify this with your Nissan parts guy with your VIN. If yours has California (or 50-state) emissions, yours may have four in which case you need to know whether the code you pulled is for front bank two or rear bank two.
go here: http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf