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)

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.

Perfect fit for 2008 GX470

I couldn't replace these myself, but when I took them to my mechanic he asked if they had connectors. He was pleased that he didn't have to do any wire splicing along with the chore of getting the old sensors out. Now I wasn't getting any engine codes from my old sensors, but they had over 500K miles on them so I figured it couldn't hurt to change them. Not only was I right in my assumption, I was shocked at the performance gain. I was afraid the engine was running rich, but it was actually running lean. And I didn't lose any MPG with the power gain, and it's still at the EPA rating for that vehicle. But it runs like a new truck again.

Denso quality is very important as this sensor determines and sets the correct fuel mixture , Your records will indicate that two attempts have proven that your catalog listing is in error. One of the two sensors promised for next day delivery proved never delivered. Your customer surface agent placed a second replacement order that proved faulty and will not function when installed. ( not easily accomplished ). Manufacturer Denso indicates correct part number is 234-9051. Judging from negative feed back from numerous other customers your catalog listing is the source of the problem. Cancel promised delivery of Denso 234-4138 . Please ship Denso listed application #234-9051 sensor. Regards, Mike Maher, master certified ASE technician. licensed automotive instructor. Return shipping permit and credit needed.

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

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.

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.

This is a upstream sensor, goes closer to the engine/front of the vehicle. I had a engine light code come up with was also causing my bank 2 to be too lean and also causing misfires. Replaced this 02 sensor along with the affected spark plugs and fixed my issue. Will buy again when needed.

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!

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

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

Worked great in my fj cruiser bank 1

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. ✌🏻