Denso 234-4622 Downstream Oxygen Sensor with 12” Harness and 4-Terminal Square Connector

Ordered this for a 2011 RAV4 with 2ARFE engine - throwing a P0136/P0137 code. Identical fit as the old one. Difficult to say if the OE was Denso or not (was stamped Toyota with no easily identifiable info) but I wouldn't be surprised if it was. Removal was 'interesting' - not so much the sensor itself (I feared it would be seized but came off easy with my 22mm O2 crow foot), but more getting to the connector and disengaging it from the plastic intake manifold without breaking anything. The connection is very solid - had to zap it with electronics cleaner to 'clean' it up a bit. Reassembly was easy - but even connecting it back required slight use of pliers as I couldn't get it to click by hand. Old O2 sensor had a failed heater element which I confirmed by not finding any resistance between pins per service manual. New one has a slightly different head design (more holes it seems). Really competitive price for once on Amazon compared to what I could find elsewhere - came out even as if I had ordered it from Rock Auto ...

Tome el número de parte del fabricante denso y es justo la parte y original , problema resuelto,

This is the downstream sensor and is under the car, not under the hood. Worked well on my 2011 camry and the price is half of what the auto parts store sell them for.

After installing the o2 sensor my lights didn't come back on. Works fantastic. FYI, i changed my fuel ratio sensor the same time i changed my o2 sensor, these two devices look alike and they work in conjunction with each other. Save yourself a 600$ Bill from the shop. Note: Make sure your car is bone Cold before doing the work or you'll burn yourself. 1. Buy an o2 sensor socket for 10$ at the shop or here on Amazon to help you remove these devices. 2. Use WD40 or whatever proper penetration chemical you have and spray on, let it sit for 5 to 10 mins. 3. Unplug your car battery 4. Unscrew them out, and Screw new one in, pop the electrical plug back into their respective sockets and you're done. 5. After putting everything back together when starting your car it will idle roughly for a while feeling like it's gonna die, it is normal and that's because your car's ECU or computer chip w.e. thingy is re-calibrating the oxygen reading and fuel readings. Just drive for a while and eventually the rough idling will go away. It could take more than a couple drives before that ugly idle goes away. If you have a 4 cyclinder Rav4 the o2 sensor is NOT under the driver side, it will be by the passenger side(most videos on youtube will say it is on the driver side, that's for the v6 rav4). Just follow the exhaust pipe up to the cat converter/engine(As you can tell i'm no car Tech and got the job done) and you'll see it near the passenger side. Thank You Denso! I am definitely satisfied with the item. FYI: BIG..... Difference in fuel efficiency after I replaced those two parts. I definitely get to commute more often now before I need to refuel and all of my dash lights are now gone, Check Engine, 4WD, VSC and ABS lights!

Very easy to install, perfect fit. Won't replace the O2 sensor upstream of the catalytic converter of the 4-cylinder 2012 Toyota RAV4 though, which is also referred to as the Air/Fuel sensor. The wiring harness connections are "keyed" differently and won't fit. Sadly that sensor is more than twice the price. The secret to removing the old sensor is to run the cold engine just briefly to thermally expand the exhaust pipe, without making things too hot to touch. This Denso brand sensor comes with copper-based anti-seize compound included.