Denso Oxygen (O2) Sensor - 234-4162 (Fits Select Years of Toyota: 4Runner, Pickup, Sequoia, T100, Tacoma, and Tundra Vehicles)

I spent months trying to figure out why I had a P0135 code and CEL. This is the 3rd O2 sensor I've purchased. The first two were knockoff foreign brands. They were garbage. This denso fixed it immediately. Highly recommend. Half the price of other OEM sensors. Error code gone. Easy, inexpensive fix.

Fit as intended, the connector was correct, and came with the gasket. Fixed a check engine light on a 1995 T100.

This O2 sensor does as it should. Check engine light tuned off and have been running it for about 1k miles thus far.

These are genuine Denso O2 sensors and were sealed and packaged in new packaging from manufacturer. My equipment mistakenly showed an issue, however upon further investigation these O2 sensors were new and genuine Denso O2 sensors and I would buy them again.

Oem Denso part yes. But it'd be great if it came with the gasket. Just a heads up.

My CEL (check engine light) had recently come on in my 2000 Toyota 4Runner. I tried a couple other interventions before finally deciding it was probably from a dead oxygen sensor. This particular vehicle has an "upstream" sensor and a "downstream" sensor. The sensor is the same for both applications (they are juts in different parts of the exhaust system). I only replaced the upstream one (for now). It fit as OEM. Fairly easy to do, although I did hit the old one with some PB Blaster the day before to loosen things up so that may have helped. I have read they can be tricky to remove sometimes. The whole process probably took less than a 1/2 hour. I then disconnected the negative battery terminal to reset the vehicle's computers, then reconnected it and fired it up. CEL light gone and performance restored. My mileage is not where I think it should be and it is possible the other sensor also needs to be replaced, I will purchase this product again when that time comes.

Edit 11/20/23: MAF still working nicely. Yes on the Hitachi and yes on the Denso O2 Sensors. Dew it Grasshopper!!! Had cleaned the original MAF Sensor a few times over the years, but still couldn’t remove the small amount of black carbon on a few of the delicate inner sections. Stealership wanted $175 for new one. Sourced the manufacturer to Hitachi by looking at the snap on cover of the original MAF on the engine. Sourced it back to this store along with New Denso o2 Sensors. Ordered and installed the MAF 6 months ago along with 4 New Denso o2 Sensors. Engine is much torquier! MPG is slightly better now due to the combination of MAF and o2 newness. Tested the old MAF per Toyota FSM Spec and it was out of spec. Same with the old o2’s. After almost 20 years guess it was time? Truck was purring nicely before swap (even being out of spec), but man that awesome torque has come back that I remember when she was new. Engine is even smoother now. The 4.7L rules. Side notes: Looks like Hitachi grinds off the Toyota stamping for branding issues. Sensor doesn’t look used/remanufactured as stated in another comment above. Looks like the exact part as the original. No worries because the original cap pops off and snaps over the New Sensor. Also the cost is $55 vs $170. Made in USA! Denso is Made in USA quality. Comes with Copper Anti-Seize. Suggest buying Lisle Thread Chaser to clean up the threads on the front o2 sensors. Also, a sensor socket is good to have for swapping out the fronts. May want to purchase some new nuts (4) for the rear sensors as the old ones are most likely rusted/deteriorated. If one of your o2’s is bad, suggest replacing all 4 at the same time and be done with it. Restore that sweet torque.

Don’t. Came in. No damage. Fit great. Works like a charm.

Direct replacement for front o2 sensor, put out the the cryptic P0125 code and drasticly improved fuel milage. No filing out holes, no stretching of harness. Fits like OEM

No hay nada que agregar los sensores Denso son los mejores que he utilizado en mi Tacoma en cuanto hice el reemplazo se noto la diferencia. Los recomiendo ampliamente no se arrepentirán.

I have a 1998 Toyota 4Runner and this Denso unit fit perfect including the wiring connector. So far, so good. Its working. Easy to install.

Original denso 100% lo recomiendo y en lo personal lo compre a un super precio

Nice to be able to use OEM quality parts at a reasonable price that fits the requirements. Also Denso delivered promptly and the customer Help department was top notch, nice to deal with knowledgeable and friendly people. I highly recommend this supplier.