jc whitney has 02 sensors for cheap. i dont know how to tell what kind i need though. is the max 02 sensor 1-wire or 3-wire? the sensors are supposed to be universal but i wanted to make sure i could use theirs. the 1-wire is $30 and the 3-wire is $50. anybody know how to tell if i can use these or not?

 

And is there a way to tell if its bad by looking at it?
I started to get horrible milage about a month ago, like 16 mpg on 60% highway driving... I don't want to replace the O2 sensor if its still good. Where can I find it on the car?

 

Spend the extra money and buy an OEM replacement.. Go to Nissan or carparts.com and get either OEM or a Bosch sensor from carparts.com..

they're about $114 from carparts last time I checked, but you can get lotsa discounts on their site.

when it comes to parts like that, don't waste your time with non-oem parts. the only reason I even suggest getting a bosch from carparts.com is that Nissan OEM sensors are made by Bosch with simply a different nameplate stamped on them.


As for the location to check it, it's on the exhaust pipe just by the cat.. crawl under the car and you'll see it. you'll need a 17mm (I think) wrench to pull it.

there's no way to visually see if it's bad.. if your car has over 90k mi on it, it's time to replace the sensor..
sometimes they can be fouled by high emissions causing carbon buildup on it, but that's usually not the case in our cars.. these sensors only last so long, then they die..
one of the big symptoms of a bda sensor is poor gas mileage, so if you're only getting 16mpg, it's probably a good time eto change the sensor.

 

You could use the 3 wire O2 sensor. The only problem is that for the sensors they sell you would have to splice them into your existing harness. If I were you I would look around at auto parts stores. I found a replacement for mine for like $60. I was going to get one from JC Whitney too, but I needed one right away. If you get one from an auto shop make sure its not the universal though. Those you have to splice too.


92GXE, touring wing, 18” racing wheels, Port&Polished intake, custom intake, custom yellow interior, racing seats, back seats taken out and replaced with subs and amps, NOS kit, Suspension tech. Lowering springs, custom grille, soon to be custom painted and have the whole engine rebuilt for big shot NOS and custom SC and tranny converted to 5-speed.

 

ok, thats what i needed to know. thanks

 

Just wanted to tell you that mine had three wires. I don't know if this is standard but I was told that the three wires were for the sensor and the heater for the sensor that was built in. That is the difference. I had to cut my wires anyway to replace it.

 

If you have over 80-90K and had the car for a least 1-2yrs I think it's about time to change the sensor. O2 sensor should be the most bang for the buck mod you can do because you have to have your fuel curve flowing correctly from the ECU. Once you take care of the basic fuel and ignition circuits, then you'll have all the benefits of all future mods, later.

 

As far as I know, O2 sensor must have 5 (five) wires - two wires the sensor itself, one wire is ground and two wires for heater.
Regards,
DDD

 

Some sensors are heated, some aren't. 3rd gens don't use the heated type.

there are also 1-wire sensors. don't ask me how they work, but my GF's previous car (chevy cavalier) and my old mitsu truck had one.

 

Am I the only one then with a 3rd gen heated sensor?

 

My car has three wires and so should the rest of yours.


92GXE, touring wing, 18” racing wheels, Port&Polished intake, custom intake, custom yellow interior, racing seats, back seats taken out and replaced with subs and amps, NOS kit, Suspension tech. Lowering springs, custom grille, soon to be custom painted and have the whole engine rebuilt for big shot NOS and custom SC and tranny converted to 5-speed

 

it's 3 wires..
with the cut and splice deal..becareful..the O2 is very sensitive and if you have a poor splice then it will read a incorrect voltage.
the OEM from courtesy is $104 plus ship.
Dan

 

Hmmmmm? So, the 3rd gens do have heated sensors. So Nissan wasn't wrong!

 

I say get the O2 sensor from JCwhitney and save $50. I never buy any parts from dealers unless its the last resort. They are a rip off.


92GXE, touring wing, 18” racing wheels, Port&Polished intake, custom intake, custom yellow interior, racing seats, back seats taken out and replaced with subs and amps, NOS kit, Suspension tech. Lowering springs, custom grille, soon to be custom painted and have the whole engine rebuilt for big shot NOS and custom SC and tranny converted to 5-speed

 

i only get like around 240mpg on a full tank of gas on Highway.

 

well i only get 190 per tank and thats running on fumes. so i guess i'll try the jc whitney one. 3 wire right guys? i'm good with electrical stuff, so i wont do a bad splice or anything like that. i know better.

 

Oh yeah.. I do seem to remember seeing a part listing for a "heated" O2 sensor on Maximas also...

but I dunno.. seems to be very uncommon.. maybe Kaleb could hook us up with the info on these differences.. I'll cal him since he's at work.

 

Da@#! I get 370 mp tank of gas!

 

Hi guys,
I have to tell you that my 92 Max have 5-wire O2 sensor. I've seen it many times with my own eyes. The wires divided to two different cables and run through two connectors - 3-pin and 2-pin.
Note: my Max is European one.
Regards,
DDD

 

I just replaced my O2 Sensor. It is a heated O2 sensor. It is a 3 wire device. I would buy OEM. I had a difficult time getting my old one off - not at the sensor but at the connector. It had accumulated dirt and small stones. I had to cut part of it to get is off. I would have been in deep weeds had I counted on having that part of the harness to "splice" a new sensor to. Again, I'd go OEM. Mine was about $114.

 

does it cut back on your cars acceleration?