Denso Air/Fuel Ratio Sensor - 234-9051 (Fits Select Years of Toyota: 4Runner/FJ Cruiser/Land Cruiser/Sequoia/Tacoma/Tundra and Lexus GS300/GS350/GS450h/GX470/IS250/IS350/LS460/LS600h/LX470 Vehicles)

Exactly what it was supposed to be.

The local Toyota dealer wanted $280. This was less than half the price. The air fuel ratio sensor arrived in two days. My 2006 Toyota Tacoma V6 had a check engine light come on. The code read P0051. My code reader said air fuel ratio sensor (Bank 2 Sensor 1) Circut low input. On the Toyota bank 2 means the driver side and sensor 1 means before the catalytic converter. Bank one is the passenger side and sensor two means after the catalytic converter respectively. My car has four sensors. I sprayed the sensor with some PB blaster to loosen it and try to take out the sensor using my 02 sensor socket but couldn’t get it removed because of the weird angle and lack of space. I went to AutoZone and they loaned me their O2 sensor kit which looks like a little C ring with an offset tab for your socket extension and I was able to get enough leverage to get it out and it came out no problem. They just charge you a deposit and refund you when you bring back the tools. Without their tools it would have been virtually impossible for me to get out the old sensor. Be sure to squeeze/press the gray tab on the old Sensor to remove it and it slides out. Be sure to use the anti-seize liquid that comes with a new sensor and squeeze it on the threads before reinstalling the new sensor. If your check engine light is still on, use the code reader to clear the codes. This fixed my problem. 100 or so miles and no more check engine light. PS. This sensor cost more than a typical oxygen sensor because it is in fuel air ratio sensor.

Not a whole lot to say as this looks like it is a legitimate Denso (OEM supplier) sensor. Based on the part number, this should have been a direct replacement for the sensor that had gone bad in my car, and it was. It was a little difficult taking the old one out due to the very limited space in the engine bay, but the install was relatively easy. Just be very careful not to touch the probe end or to bang it on anything, and be VERY careful not to cross-thread it. I was happy that it shipped with a plastic thread protector and the threads were pre-coated with anti-seize (a good thing, because I forgot to buy some beforehand, and once I took the old one out it was a little to late to run to the auto parts store and buy it). Overall, the replacement stopped the ECU from throwing the codes and causing the CEL. It also looks to be good OEM-like quality. I've put 500-600 miles on since the replacement and haven't had any issues. Let's hope this one lasts 14 years and 110,000 miles like the first one.

Worked fine for 60 days. Then failed with code saying heater circuit open. All wires look great. Nothing broken. Put old sensor back in and code went away. Put this one back and code came back. Spend the money on one that’ll last.

Installed it myself and I don’t work on cars. Don’t pay for this crap at a mechanic..just get the wrench also. Easy.

It would be 5 stars but they cost alot of money. Not very easy but not that hard to install. Might have to stand on your head. Used a 13/16 box end wrench to get off the old 1. Same to install. Also if you disconnect the battery you'll have to drive alot to reset computer. Once reset it passes smog. Fun times

Had one of my catalytic converters stolen (passenger side) on my 05 Tundra 4.7 V8. The muffler shop only replaced the missing cat and the o2 sensor that was attached. I had an engine check light come on because the old Air Fuel Ratio Sensor was original and the O2 sensor was too new. Hence, the computer detected that there was a leak between the forward sensor and the o2 sensor on the same side. I decided to change the remaining 3 sensors to bring them back up to speed. Afterwards, you can feel the difference the new sensors make on a vehicle with 70,000 miles that is 10 years old. It runs quieter and with good response. After some driving, the check engine light went away with the new sensors and I could not be happier with the money I saved. To replace all four sensors, I also bought the following: ABN 3 Piece 3/8" Drive Oxygen Sensor Wrench Socket Set Denso 234-4260 Oxygen Sensor (rear sensor in cat) ( I only needed one of these.) Denso 234-9051 Air Fuel Ratio Sensor (forward sensor) (needed 2 of these) OEM plugs and thread anti-seize are included. The hardest part is removing the old sensors. Take your time and use WD40 or similar to loosen the part.

Screwed up. Be careful this is for late model 05. Will not work with early model 05. Be careful put it in did not work had to go to auto part store to get right one. My fault.

Driver side upstream sensor went bad on my 07 gx470 so I managed to track down the part number and narrowed it down to this OEM part. Dealership wanted over $400 CAD for the part so there's massive savings to be had. Part came in a legit looking box and anti-seize pre applied. Car runs with no issues now so I highly recommend it!

Direct OEM replacement for my 2007 Toyota Tundra. Hopefully last a long time.

Working like it is supposed to. No more check engine light!!

Received the sensor today! Ordered part yesterday. Super fast shipping. It appears to be 100% genuine Denso part. Sensor identification markings are laser etched (not engraved). Buy with confidence. Appreciate all the responses I received to my posted question. You are all correct! Genuine Denso part. ✌🏻

Replaced Bank 2 Sensor 1 on an 06 Sequoia and it worked perfectly! The sensor is pricey but was still cheaper than the stealership.