You guys are scaring me, I just ordered all 8 NTK sensors for my 2004 and 2005 from rockauto. Better safe than sorry I guess 
The Official Jeep Wrangler TJ Oxygen (O2) Sensor Thread
- Thread starter Chris
- Start date
You guys are scaring me, I just ordered all 8 NTK sensors for my 2004 and 2005 from rockauto. Better safe than sorry I guess
I did tha same thing back when NGK/NTK said they were discontinuing the line.
Guys, thanks all for your help and comments. This what rockauto offers for my 2.5l, i dont like that Walker offers the same sensor for down and upstream, i think the purpose is definitely the same for these sensors, so i would like to ask your opinions. And also, it seems Delphi has potential?
They are litterally just temperature sensors. Many times different part numbers are assigned to identical sensors with the only difference being the length of the wire between the sensor and the plug, or perhaps a slightly different plug..
My guess is that the Walker just decided to kill 2 birds with 1 stone (so to speak)...
Can confirm, I drove it the last 2 days without issuesWatch, I'll drive it to town tomorrow and they'll all 4 set codes off
Devinr29
TJ Enthusiast
T A
TJ Enthusiast
Hey guys, I just got the P0138 code. O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
I'm not having any luck finding the NGK / NTK replacements. Does anyone still have a good source for these?
Edit. Found the right post on here and looks like the Denso 234-4078 is the correct match for the downstream sensor.
https://www.amazon.com/Denso-234-4078-Oxygen-Sensor/dp/B000C5UFNK/?tag=wranglerorg-20
Rock Auto is showing both Walker sensors in stock but I'm going with the Denso since that seems to have given good results.
Still trying to find the correct Denso upstream sensor part number.
I'm not having any luck finding the NGK / NTK replacements. Does anyone still have a good source for these?
Edit. Found the right post on here and looks like the Denso 234-4078 is the correct match for the downstream sensor.
https://www.amazon.com/Denso-234-4078-Oxygen-Sensor/dp/B000C5UFNK/?tag=wranglerorg-20
Rock Auto is showing both Walker sensors in stock but I'm going with the Denso since that seems to have given good results.
Still trying to find the correct Denso upstream sensor part number.
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If you have read all the posts you'd have seen that others have been seeing good results with Walker sensors too... Food for thought.
T A
TJ Enthusiast
Yes thanks. I'm slowly making my way through the 40 pages. I'm ordering the other Walker from Rock Auto
Just FYI, the first and third links go to sensors with numbers that don't match the "23179" that's written.
Time to get to work on updating the original post with Walker O2 sensors as well.
Is it really the same for upstream and downstream? I thought that the original links were correct, and that the text in the post was just wrong.
At least I hope so, because I used those links to purchase NTK 23099 (high) and NTK 23506 (low) a year or two ago. I only noticed the inconsistency when returning to this post today.
When I clicked on the original links it took me to Amazon Canada and gave me two totally different part numbers.
I'd suggest cross referencing with the NGK / NTK website just to be sure.
@reddvltj, any idea why the Walker sensors have two options? One says OE replacement and the other says OE base sensor.
See here for example (this is for a 1997 TJ with only two O2 sensors):
https://web.tecalliance.net/walkerp...9;parentAssemblyGroupId:9;assemblyGroupId:202
See here for example (this is for a 1997 TJ with only two O2 sensors):
https://web.tecalliance.net/walkerp...9;parentAssemblyGroupId:9;assemblyGroupId:202
Just spoke with them. Apparently NGK used to list the 23099 as downstream, and the 23506 as upstream. Those are the links you had previously, even though the text of your post said 23179. But the only difference between 23099 and 23506 (according to the phone rep) was the length of the wires. So they decided to just discontinue the one with the shorter wire, and go with the longer wire version in both locations, and give it a new number (23179) that works for both locations.
Interesting! Thanks for this tidbit.
I suspect NGK sensors won't be around for long so I'm prioritizing these Walker sensors.
That circles back to the question of why Walker only offered 1 part number as a replacement for the 2 different NTK sensors...
From what little information I can find, it sounds like the "OE base sensor" is designed to be a direct replacement for OEM NTK sensors, and the "OE replacement" is a less expensive or "economy priced" version. More or less a Premium vs Economy thing.
It would be interedting to see which versions those who have been using Walker went with...
Does the economy fall victim to the same sensor error issues that most aftermarket sensors do?
Is the Base the version that line that people have been having good luck with?
These 2 videos are where I am drawing my assumption...
You have to pay very close attention the language being used. At first view I thought the videos were the same.
At 1:08 "Walker's aftermarket oxygen sensors" Video Titled "...OE Replacement..."
At 1:23 "With our Walker Original Equipment oxygen sensors" Video titled "...OE Based..."
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At some point maybe I'll call them and see if they can clarify.
The other thing that dawned on me is that maybe the OE replacement sensors use plug-and-play connectors whereas the OE replacement sensors use connectors which require cutting and splicing? I may be far off so I'll just defer to what is said in those videos. Either way, I'll list part numbers for both and link to your videos for reference.
I'm inclined to believe what you're saying though. When you go to Autozone (or most auto part stores), they generally offer several different options. A cheaper version and a more premium version.
FWIW the Walker sensors are made in Japan. That's a good thing.