Denso Air/Fuel Ratio Sensor - 234-9049 (Fits Select Years of Toyota: Avalon/Camry/Highlander/RAV4/Sienna/Solara, Scion: tC/xB, and Lexus: ES350/RX350/RX450h Vehicles)

This sensor fixed both my pending codes. And took away check engine light. Good oem sensor for 2003 Camry 4cyl

I got this for my 08rav4. Works well and cleared the codes.

Works great! Runs better (smoother, quicker). No more CEL! No more 'bad codes'.

I get a check engine light on and the OBDII scan gave a code of P2238. The Car manual says the P2238 means “Oxygen (A/F) sensor pumping current circuit low (bank 1, sensor 1)”. It is obvious that the oxygen sensor will replaced. My friend offered me to help me to replace the Oxygen sensor and he said all you need to do is to buy a Denso Oxygen sensor and make sure it fit your car model. However, I am an extra careful person and do not want to take any risk. I know that dealer may charge me $400 for an oxygen sensor while I can get here for $100 and my friend can put it on for me for free, but I trust the big dealer. I bring the car to a Toyota dealer and would like the dealer to check and replace the Oxygen sensor. I leave the car with dealer (called AutoNation, Toyota South Austin, 4800 IH35 South). This is a very large dealer and used called Champion Toyota. A couple of hours late, the guy called me and say “okay, your oxygen sensor is okay, but the wire harness goes into the Oxygen sensor is bad. The replacement cost will be $932.82”. I am suspicious of that because the code says “Oxygen (A/F) sensor pumping current circuit low (bank 1, sensor 1)”, If the wire is broken, then it should be no current at all instead of low current. It should not be a wire harness problem. I asked him can you tell me what is the part cost and what is the labor for that $932.82? He said we do not give that details, we only give the total replacement cost. Then I told him that I will think about that to decide whether I will do it there or not and I paid him $68 diagnostic fee. He said “that’s fine but the wire harness can only be get through Toyota dealer, you cannot get from anywhere else and the cost is going to be the same”. Then I did some research and try to understand what the heck the wire harness is. There are four wire connector for this oxygen sensor. One wire is the heating wire which should export a 12 V to heat the oxygen sensor. There are two signal wires, which should output a voltage of 0.2~4.3 V and the reference wire should have no voltage output. What I did was to unplug the oxygen sensor and use a multi-meter to measure the voltage from thatharness socket. The positive end of multi-meter goes to each of the four holes of the harness socket and the negative end of multi-meter goes to the negative end of the car battery. What I got was 12, 3.3, 2.9 and 0 Volts. That harness is perfectly fine! Then I emailed the dealer guy “what voltage he got from these four wire? Why he think the wire harness is not good?” but did not get his response Based on that, I let my friend installed this Oxygen sensor I bought here, and surely enough, the check engine light now is off and we rescanned the car in Autozone, there is no any error code any more.

The sensor itself works great once installed—Denso is reliable and my engine performance improved right away. However, installation can be tight depending on the vehicle, and you need the right socket to avoid stripping it. Once it’s in, the car runs smoother and fuel mileage improves.

When looking for an OEM sensor to replace your old sensor, don't make the same mistakes that I did if you have a 2AZ-FE engine with California emissions. Different sources online make you think that certain sensors fit, but they won't. Denso 234-4624: Connector won't fit Denso 234-9010: Connector fits but it's the wrong type for my California emissions engine. Engine will run rough, save your time and don't try to make the ECU learn the new sensor. The old sensor in this car lasted 22 years/138000 miles and still works. It's not giving me a code, but after all this time I decided to replace it with a new sensor as part of preventative maintenance as I have read old oxygen sensors can get "lazy" without throwing a code. I'm hoping to achieve a little better gas mileage with the new sensor. By buying this name brand Denso sensor from a reputable source (the one I got was sold by Amazon directly) you save a lot of money compared to local parts stores or Toyota. Installation is easy with the help of a sensor socket.

So, My 2004 2.4L (4 cyl) camry had a p2238 code. My scanner tool stated 02 sensor Positive Current Circuit was low. Solution offered, to replace upstream sensor. The toyota sensor is a Toyota brand number 89467-33080, which is nearly $200. after hours or research and online videos, the Denso 234-9010 was said to be the oem replacement for the toyota. I replaced the sensor, the code went away, BUT the car now had hesitation and would not accelerate smoothly. after 15 miles of running a new code popped up. P0032 heater control circuit high on the this new sensor. Some comments on amazon and even some online video comments had issues as well and even suggested a different sensor : Denso 234-9049 Air Fuel Sensor. I Returned the Denso 234-9010 & bought this Denso 234-9049. WOW, what a difference. No codes, and car runs even better than the original that broke. Engine is smooth and strong. You cannot feel it or hear it when idle. Great sensor. Hope it lasts.

Doesn't work,check engine still there. I ended buying the OEM at the local Toyota dealer now the lights are gone.If your thinking to buy one,just save your money and get the OEM's.

We have a 2008 Toyota RAV4 Limited with 3.5L V6 engine. Our vehicle has a little less than 100,000 Km on it. After our code reader showed P0051 Oxygen (A/F) Sensor Heater Control Circuit Low ... I purchased this unit from Amazon. It matched the correct part number on the DENSO "find your part" website. Its an exact match of the factory part. The Toyota dealership wanted almost twice as much for the part. I sprayed the base of the original unit twice with penetrating oil over a 2 day period and ran the engine for about two minutes to warm a bit before attempting removal (winter climate - working outside). Used a 7/8" oxygen sensor removal socket, extension bar and a half inch breaker bar. A couple of sharp raps on the end of the breaker bar broke it free and I unscrewed it with my fingers. The threads remained intact. Be sure to put the copper anti-seize, which they included, on the threads... but don't get any on the sensor. I used a Q-Tip to apply. Getting the electrical connector at the other end of the cable was more trying, especially in the cold. I slipped a very small slot screwdriver into the connector and gently pried it apart. Don't break the connector.. as this would be a big hassle. Re-fit the cable keeping it away from hot surfaces. Started car, cleared the codes with the code reader and the dash lights have never come back. Car runs great. Good luck with yours!

ES LA MEJOR MARCA EN SENSORES DE OXIGENO, FUNCIONAN DE MARAVILLA OTRA MARCAS FALLAN MUY PRONTO

Box was not in good condition when delivered. I used it in 2010 Lexus RX 350 . It's easy to install. It's been a month and no engine light

El sensor llegó en su caja y bolsa sellada, no tiene marcas de haber sido usado, se ve que sí es original (marca y matrícula grabada en el cuerpo del sensor, cables y conector robustos).

I recently installed this O2 sensor on my 2010 Rav4 V6 with about 250,000 km. Check engine light, 4WD and VSC lights were showing on dash. Code scanner indicated trouble codes P0051 (O2 sensor heater) and P2197 (O2 sensor fault) on Sensor 1, Bank 2 (upper sensor on left side of engine, near front of vehicle). New sensor is OEM quality (Denso apparently supplies Toyota), fit properly and was about $100 cheaper than local Toyota dealer price.