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Your cart is empty.Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor
Caroline
Reviewed in the United States on February 13, 2025
Came broken never worked had to pay $150 diagnostics fee just for them to tell me I received a defective part.
Vincent Bowen
Reviewed in the United States on January 6, 2025
The media could not be loaded.
P. Vu
Reviewed in the United States on April 7, 2025
Awesome part! It makes my car run smoothly.
Wooooo
Reviewed in the United States on March 1, 2024
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
Isuru Weerathunga
Reviewed in the United States on February 17, 2024
its fits perfectly and working as expected. No errors anymore. Thank you.
Derick
Reviewed in Canada on April 21, 2024
Folks, don't buy an aftermarket sensor if you're looking actually to resolve your issue. If your A/F sensors are out, then the originals will always perform much better and turn that pesky Check Engine Light off for you. Take it from someone who has attempted the aftermarket brands to no success.If you require these sensors for your vehicle, look no further!
Linh N.
Reviewed in Canada on July 5, 2023
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!
Paul Difant
Reviewed in Canada on January 25, 2023
Working like it is supposed to. No more check engine light!!
angus
Reviewed in Canada on May 15, 2022
Problem solved just plug and play
Brad P.
Reviewed in the United States on March 9, 2022
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.
Oldeneye
Reviewed in the United States on November 4, 2021
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.
Craig
Reviewed in the United States on July 8, 2020
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.
James
Reviewed in Canada on May 4, 2019
Replaced Bank 2 Sensor 1 on an 06 Sequoia and it worked perfectly! The sensor is pricey but was still cheaper than the stealership.
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