Zack92MJ

So I was looking at getting new O2 sensors and this one says 'rear' O2 sensor, so i was wondering if itd work in the front too? haha

http://www.autopartswarehouse.com/sk...gs+Best+Seller

and if not would this work for the front?
http://www.autopartswarehouse.com/sk...gs+Best+Seller


Heres where im finding them:
http://www.autopartswarehouse.com/search/?Nty=1&Ntx=mode+matchallpartial&Ntk=main&VN=429496 6246&Ns=price|0&N=0&Ntt=jeep+cherokee+o2+sensor&Nr =AND%28universal:0%29&refType=Remove&refValue=Pric e|Less+than+%2450

Any help on this would be great.

Thanks,
-Zack

Firestorm500

There might be subtle differences. Get the proper one or you may be buying and installing 2. One incorrect and one correct.

Zack92MJ

So research, research, research then?

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tjwalker

Don't guess. Use the correct P/N for every application.

I recommend NTK. They are the OEM supplier of oxygen sensors to Jeep.

CoffeeCommando

The connectors, and cable lengths, are different. The rear 02 sensor uses a black plug that DOES NOT match up to the front 02. For some reason, which makes me think they are NOT the same, the barrel connectors were made different so that you can't accidentally install them backwards. Get the correct part number.

Also, don't use Bosch. NTK is the safe way to go. I have also heard a few good results from Denso, but a lot more about NTK which is the OEM that came with the XJ. You don't want to gamble on an 02 to save a few bucks. With the way gas prices are it isn't worth it, and neither is buying another 60 dollar 02 sensor.

EDIT: I just looked at your page. DON'T BUY ANY OF THOSE. Those are all one wire 02 sensors. OURS IS 4. Stay away from those wholesale sites. They just sell massive amounts of parts without knowing what it is that you need. Not all 02 sensors are the same, and there is NO information on ANY of those 02s. They all have one wire and say "OE", but don't specify that they are actually 4 wires. I doubt you want to spend 30 bucks just to find out it isn't what you need and all sales are final. Then you still have to go buy the correct 02.

Just go to NAPA and get an NTK, which they normally have in stock, for $57 + tax. They're worth every damn penny. I'm getting excellent gas mileage and I drive a stroker. Better than before I stroked it.

Zack92MJ

Oh alright, that sounds good to me.

Gee oh Dee

Those o2 sensors do different things.

CoffeeCommando

Things like not-work I would say.

Gee oh Dee

Sorta.

They are both called oxygen sensors. However only one communicates with the ECU in respect to how much fuel is being given to the motor. The other ONLY tells the ECU if the cat is working correctly. It does NOTHING more, dispite what some people claim.

CoffeeCommando

I remember reading about them both somewhere. The both do the same thing. The ECU reads them both the same. The difference is that the one behind the cat is supposed to have substantially less monoxide and be within a specified limit that as far as I know only the ECU knows. The ECU references one and makes changes to ensure good gas mileage, the other triggers a code if it goes out of the maximum range, meaning its time you investigated the cat/exhaust system.

Gee oh Dee

In a way, yes. They both 'sniff' the content of the exhaust. But the ECU relies only on the first to keep the truck running well. The second only causes CEL to get tripped if the cat isn't functioning correctly.

That's why you can get away with leaving the second sensor plugged in but not installed in the exhaust and still run 100% fine.

Zack92MJ

So what would you recommend for the upstream one?

CoffeeCommando

NTK. From NAPA only.

Lostfisher1

I cannot find the 02 sensor on napa. did u mean NGK

EastBeast

I have a 2000 cali package so 4 o2 sensors total. The mopar part numbers for the upstreams are 56041212AE and 56041213AF. I scored my replacements off ebay, mopar bags, stamped made in Japan by NTK. Spent just over $100 shipped. NGK makes sparkplugs but NTK is their brand of o2's.