Discussion Starter · #1 ·
hey mag, for starters, please send private message or start a thread so we can respond easily, or so other who have same question can view responsesHey man, I know that you are an expert in the forum. May I ask you a few questions regrading how to replace an o2 sensor. I have a 2002 Sentra Spec V.
I remember that you recommended buying Denso or NTK o2 senors. I'm leaning toward Denso 234-4296, but someone on here also mentioned that it doesn't come with a connector. I'm confused because I don't want to do the wiring. Can you tell me what o2 sensor you are using please. I need a o2 sensor that has a connector.
As to how to replace, do I just unplug the old sensor (the one close to the engine), and then plug in the new one?
I hope you can help me out. I've searched the forum, but I couldn't find what I looked for.
Thank you so much
im not exactly an expert, just a little more experienced i guess, it comes with mileage. im assuming you are talking about the upper/upstream o2 sensor(green connector), which is closest to the hood. the lower/downstream sensor(blue connector) is closest to the ground. NEVER get a bosch o2 sensor for any nissan. i looked up the part number you gave, and it shows it comes with a connector from napa...? see link below. if you order that one from napa, call and/or return it for being the wrong part.
install upstream/upper: no key in ignition(keys in pocket), unplug old green connector, pb blaster if necessary, remove old, DO NOT GET ANTI-SEIZE ON TIP OF SENSOR!!!, insert and torque new sensor using hand wrench, connect green connector, start up motor. it may hesitate a little on startup, but its ok and should still run, the ecu will learn the new values once youve done some driving.
i get stuff from napa or autozone, because i know people who work and get discounts. i know napa also offers a AAA discount which could save a few bucks.
this is the exact sensor i have, i got it locally from napa:
this one should also work, just an extra $25: