[i68k]

Hey 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
Mag

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 responses

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:
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=NGK24298_0295717366

this one should also work, just an extra $25:
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=DEN2344296_0296300379

 

[i68k]

i should also mention, you may to ziptie the wire so it doesnt get close tot he fan!

 

[Michael48]

I have always purchased NTK for all of my cars of all different makes. They've always been connectors, no wiring.

If you are located in Canada, I recommend Auto Parts Way. They sell all of our sensors for under $100 and with free shipping. Napa charges 160+ for sensors up here

 

[Mag]

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 responses

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:
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=NGK24298_0295717366

this one should also work, just an extra $25:
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=DEN2344296_0296300379

lol this embarrassing. Thanks anyway =]

I also found those sensors on Amazon, and they seem to be cheaper. Links:

Are these the exact same sensors as the ones from NAPA?

 

[i68k]

its hard to tell if they are the same. sometimes the short part# is the same but the index numbers are different. on amazon, it doesnt show the connector and is under $50, so i would be a little skeptical about it coming with a connector. also, i know amazon has the 'contact us' thing, so you could send them a message, not sure if they have live chat support. i think the part gets drop-shipped from a different vendor tho, amazon may just take your money

example, not actual part numbers:
Denso 234-4296 -short number
Denso 234-4296-01 -has connector
Denso 234-4296-45 -no connector
so sometimes when you look online, it only shows the short numbers. thats why sometimes i prefer to goto the local parts store and make sure be it gets ordered. not to mention i dont have to wait a week for shipping.

 

[Mag]

Ok, I will ask them.

One more question. Is NGK or Denson the oem o2 sensor? Or something else?

 

[i68k]

depending on year and/or model, the oem manufacture is either ntk or bosch. but trust me, you dont want a bosch, those are usually the ones without a connector, and sometimes either amperages or ohms is incorrect for the vehicle. when i look up 02 specv, it shows ntk as oem equipment, but 02 gxe shows bosch is oem equip. from personal experience, its not that bosch is a bad company, but unless youre driving a european vehicle, bosch stinks. ive had probs with bosch auto parts on american, korean, and japanese vehicles, so i stay far away from bosch auto parts. however many vw, audi, bmw, etc european manufactures bosch seems to work very well.

 

[Mag]

depending on year and/or model, the oem manufacture is either ntk or bosch. but trust me, you dont want a bosch, those are usually the ones without a connector, and sometimes either amperages or ohms is incorrect for the vehicle. when i look up 02 specv, it shows ntk as oem equipment, but 02 gxe shows bosch is oem equip. from personal experience, its not that bosch is a bad company, but unless youre driving a european vehicle, bosch stinks. ive had probs with bosch auto parts on american, korean, and japanese vehicles, so i stay far away from bosch auto parts. however many vw, audi, bmw, etc european manufactures bosch seems to work very well.

You are awesome man! Thanks so much for your quick reply.