01Pathy3.5LE Posted April 8, 2008 Share Posted April 8, 2008 Hey Everyone. Haven't posted in a while so I thought I would. My Pathy is at 115k and I have a CEL on. Looks like a bad o2 sensor. Question is, Should I replace all o2 sensors due to age of vehicle and mileage, or just what the codes read as the bad ones. I am going to be replacing plugs and wires as well, just curious on your thoughts about the o2 sensors. Thanks! Link to comment Share on other sites More sharing options...
rod_b Posted April 8, 2008 Share Posted April 8, 2008 Since they're about $140 each, I would just do the necessary ones...if you're going to do the work yourself that is. Link to comment Share on other sites More sharing options...
HankG Posted April 8, 2008 Share Posted April 8, 2008 I replaced all four of mine with Bosch universals for $25 each. I can't tell you how long they last since I only changed them 3.5k miles ago, but I haven't had any problems and easily passed the smog test. Not really your question, but if you do decide to replace all four, you might want to think about just using universals. Link to comment Share on other sites More sharing options...
01Pathy3.5LE Posted April 9, 2008 Author Share Posted April 9, 2008 I replaced all four of mine with Bosch universals for $25 each. I can't tell you how long they last since I only changed them 3.5k miles ago, but I haven't had any problems and easily passed the smog test. Not really your question, but if you do decide to replace all four, you might want to think about just using universals. Thats a great idea. Anyone else have any luck doing this same type of install? Link to comment Share on other sites More sharing options...
02silverpathy Posted April 9, 2008 Share Posted April 9, 2008 Did 2 of the 4 on my 98, much easier to use the universal. If you like, snip the wire very close to the OEM O2 sensor, make the pig tail while under the truck and spin the new one in with anti-sieze. Making the pigtail under the truck is tough, but consider unplugging and chasing the wire route isn't easy either!...unless it is in the upper manifold...completely a pain then! Link to comment Share on other sites More sharing options...
sigtauenus Posted April 9, 2008 Share Posted April 9, 2008 (edited) Did any of you with new O2 sensors see an increase in gas mileage? I am at 165,000 miles on my '98, and everything is still running strong. I did all belts, plugs and wires at 100,000 miles and was considering doing everything again here as I approach 180,000. I read on another forum (not Nissan) that you can get a 1-2 mpg by changing out the O2 sensor after 75,000 miles (even if the CEL isn't on). Just wondering if anybody with a Pathfinder saw similar results. Also, what is the source for the $25 Bosch universal sensors? Cheapest I found was $75 at Autozone. Edited April 9, 2008 by sigtauenus Link to comment Share on other sites More sharing options...
kmgar99 Posted April 10, 2008 Share Posted April 10, 2008 I found all the sensors at Rock Auto.com....they have the OEM and univerals. the universals run abot $50 each and the OEMs about $75 Link to comment Share on other sites More sharing options...
HankG Posted April 10, 2008 Share Posted April 10, 2008 I got my universals off ebay. Not sure what is there currently but you should be able to find them for around that price still. Link to comment Share on other sites More sharing options...
02silverpathy Posted April 10, 2008 Share Posted April 10, 2008 found'em....you can shop by typing "Pathfinder o2" then look for your year and the # of wires you need....aren't they all 4 wire from 96+ ? Here is some for $30 after shipping for a VQ35.... Ebay Bosch O2 sensors, new w/out box Link to comment Share on other sites More sharing options...
HankG Posted April 10, 2008 Share Posted April 10, 2008 My '96 needed two fours and two threes. I think that is the same guy I got mine from, so I should warn ya that the first "three wire" ones he sent were four wire sensors with one of the wires cut off. I e-mailed him and he sent me the right ones with no extra charge and didn't ask for the others back, so it could have just been a one time thing. Link to comment Share on other sites More sharing options...
sigtauenus Posted April 10, 2008 Share Posted April 10, 2008 Thanks for the info on the source. Anybody see a reason to change out an o2 sensor before the CEL comes on to tell you to? Link to comment Share on other sites More sharing options...
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