2006-2007 O2 (Air/Fuel) Oxygen Upstream Sensor

Hey all,

I had a bit of an issue replacing the upstream O2 (Air/Fuel) sensor in my 2006 Tacoma. Rock Auto is where I bought the sensors from. On their website, for the 2006 Tacoma 1GR-FE, it states the following:

$132 DENSO 2349051 Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor

DENSO 2349051
Upstream; To VIN 5TE*U##N# 6Z144911 (NUMMI) or 3TM*U##N# 6M003084 (TMMBC)

$134 DENSO 2349026 Denso 234-9026 Air Fuel Sensor

DENSO 2349026
Upstream; From VIN 5TE*U##N# 6Z144911 (NUMMI) or 3TM*U##N# 6M003084 (TMMBC)

So I bought the 2349026, because my vin is: 5TELU42N86Z2XXXXX. When I pulled out the old O2 sensor, it was definitely a Denso 2349051 (see attached picture showing old and new).

Couple of scenarios could be at play here: 1) Rock Auto is wrong, or 2) the O2 sensor was replaced at some point previously with the incorrect sensor.

I ended up putting in the new sensor anyway, because the wiring looked exactly the same, the connectors were compatible, etc. My CEL is off now, but the monitors haven't completed yet. My O2 sensor issue was just a P0051 (B2S1 Driver Side Upstream O2 Heater Circuit Low).

Does anyone know if the outputs from these sensors would be different enough to be detrimental to the truck? Or are they interchangeable?

Thanks in advance!

 

Hey, I was just looking at those too. Maybe I missed it, but I dont see a difference between the two VINs. Eg, they should both work.

I was trying to figure out the angle to remove it. How did you do it?

 

So far it seems like the "newer" one that I ordered (2349026) works in place of the old one. I've probably over 500 miles on it this week and still have no CEL.

To remove it I used an O2 sensor wrench and gained access to it from both underneath (next to the cat) and from behind the rearmost rubber splash shield in the wheel well. It was a PITA for me turning it a little bit at a time, but it wasn't too bad.

 

Thank your sir. I appreciate. Threw a bank 1 sensor 2 code today. P0038. Ordered the passenger rear oxygen sensor. But just in case the front one is the real culprit needed to know how to get at it. I just hope its not the cat.

Did multimeter test on the rear one and it failed so hope this is it.

 

I realize this is over a year old, but was curious if you've had any issues or CEL codes with the "different" O2 sensor?
I'm ordering replacements soon and have the same VIN situation as you.
TIA

 

Hey,

I have had no issues with the "different" O2 sensor since installing. I've logged approx. 10,000 miles since then and all seems well/no codes have appeared.

I didn't bother to change the passenger side sensor yet because it hasn't given up yet, I'll report back when I do because I'm curious if it matches the other sensor or not.

Good luck with the sensor swap, it's not too bad.

 

Thanks for the prompt reply!!!

Good to hear no problems.
You'd certainly know after 10k miles.