Nissan Repair: 1995 Pathfinder - O2 Sensor, mileage

Question
Hi,
   I think I need to replace the O2 sensor on my 1995 Pathfinder. I found the sensor but where does it connect to? Is there one connector or two?

Thanks

Answer
Grant,

Depending on your vehicle you could have two or three.  If there are no check engine codes showing them to be bad would lead me not to replace them.  Sure they get coated after this many years and if your vehicle is sluggish and getting bad mileage the front ones should be replaced.  The one behind the converter is only to rat on you if you remove the converter so unless it has a specific code do not bother replacing it.