Today I replaced my factory original upstream O2 sensor in my 2000 Dodge Durango 4.7L and wanted to share my findings.

There was nothing wrong with my O2 sensor that I know of and no check engine light. I replaced it simply because of age and because I had the inner fender liner out to do the the exhaust manifold gaskets. So it seemed like a good time to do the job.

When buying parts I typically like to stay with OEM. I also Like to save money. So I always try and research who the OEM supplier is for any given part. I don't like paying extra money for a box with a Mopar logo on it if I can get the same exact part from the OEM supplier for less.

So I set out to see if I could determine who the OEM Supplier was for my O2 sensor. After spending some time searching the internet, I could not readily figure out who the supplier was. One person thought it was mostly Denso but some earlier 4.7L used NTK. Well, NTK is my main go-to parts source for sensors so that sounded good enough to me. I ordered the O2 sensor part number #23175 from an NTK online supplier. Price: $68.57

The Mopar Genuine part is #56028233AA and currently lists for $147.89 on RockAuto.

So today when I actually removed the O2 sensor, I discovered it is actually a Denso sensor. Notice the Mopar part number #56028233AA. Here is a picture of the sensor ->

Below, a picture of the of the new NTK 23175 (top), and the Original Denso (bottom). The pigtail on the NTK is approximately 15" inches long while the Denso is approximately 9" inches.

I believe the NTK application used to be #23511 but is now discontinued. Going by the online pictures it likely had a shorter pig tail.

The Denso replacement was listed under part number #234-4634 but it too is now discontinued.

Below a picture of the new NTK 23175 O2 sensor installed. I simply tucked the extra length of pig tail behind the transmission filler tube.

Moving forward, most likely, to get a OEM shorter pigtail O2 sensor, one will need to buy the Mopar Genuine part, if it remains in production, or buy a New Old Stock Denso #234-4634 if you can find it.

Hope this helped. Best of luck on your project.

 

NTK or Denso were both OEM suppliers. Either will work perfectly fine. The length of the pigtail used to be determined by where in the exhaust system it lived. The longer pigtail was for post-cat sensors. Likely the company simply stopped making the short pigtail fellers, as the sensor at the end is exactly the same in any event. Just make sure that harness is secured up out of the way of anything that may damage it, and it'll be fine.