Denso 234-9023 Air Fuel Ratio Sensor

This is the only brand that works for my 01 Toyota rav 4. Worth the price. My mechanic has no issues with installation. Sensor functionality is great and quick about removing check engine light

I definitely like the cost compared to the OEM Toyota one. Installed this exact same A/F sensor in Bank 1 Sensor 1 position on my 2003 Toyota RAV4 and it lasted 10 years, so I figure I got my money's worth from it. The first time I replaced the sensor it was a huge pain to get out, but the sensor I bought ten years ago (and this one) came with a copper-based anti-seize lube for the threads, which I used. The sensor came right out. The other three sensors are all OEM and still working fine, not replaced since new. Maybe I got a dud the first time, maybe bank 1 sensor 1 gets more wear, I don't know. but ten years is good enough for me.

Worked great on 2001 toyota rav4. fits sensor 1 position 1 (in the usa that is the top drivers side sensor). first i read the trouble codes with scangauge II , bought the appropriate oxygen sensor , replaced it, cleared the code, and i haven't had any trouble since. before the rav was stumbling really bad on acceleration and not much power. a week later i pulled out the mass air flow (maf) sensor and cleaned it with maf sensor cleaner because the scangauge was giving me 2 new codes about lean mixture. i used half a can on that sensor. i cleared the codes and haven't seen them since. rav runs great now. i am about to pull the fuel injectors and get them cleaned because the car has over 80K miles on it so i know they need cleaning. i found out you should clean the maf once every few years depending on your environment because air filter lint and other contaminants can built up on it. the maf is actually a combo of maf and iat. i have pics but i will post later. the scangauge2 works great by-the-way , well worth the money. oh, rav is getting 29mpg on highway with the tires at 55psi. can't wait to see what i get with clean fuel injectors. i'll probably clean the throttle body when i remove the injectors i am sure it needs it.

This is correct for 2001 Rav4 1135 code but it goes on the driver's side sensor not the passenger side sensor. The passenger side is the one coming through the hole in the heat shield and the driver's side one is to the side of the heat shield. I'm avoiding confusing right / left terms except to say "driver's side" is the American version not the UK version. Also the connectors are different so if your connector doesn't fit you're putting it the wrong hole. I found a few folks who rewired their sensor(like I did) because I was convinced 1135 was the passenger sensor and not the driver side sensor and they sent me a faulty connector. I was wrong. I made this mistake after seeing some feedback saying their connector was wrong and they fixed it by rewiring it. It didn't hurt anything, it just didn't work and after a lot of splicing I get the failing 1135 (driver's side) sensor to work. I'm also avoiding the bank 1 sensor 1 or 2 and bank 2 sensor 1 or 2 lingo as it's pretty confusing and mis portrayed on various diagrams. This attached diagram seems to be correct.

Excellent: Easy to Install, (especially with the TEKTON 4929 3/8-Inch Drive by 7/8-Inch Oxygen Sensor Socket) Took 10 minutes tops. I had a "Check Engine" light come on a couple of weeks ago - since the engine started and ran well, I decided to attempt to DIY repair. I Used Amazon's Donop Professional U480 CAN OBD2 OBD II Car Diagnostic Scanner Engine Code Reader Tool (about $22 bucks) to get the Trouble Code "P1135". A couple of minutes of Google search directed me to this Denso (two of the YouTube reviewers linked back to this page, so it was both easy and cheap to obtain the parts. The scanner is hardly "Professional", but it worked just fine and was easy to operate. NOTE: You have to INSERT THE SCANNER PLUG WITH THE IGNITION OFF - but YOU MUST TURN THE IGNITION 'ON' once the reader is plugged in to allow it to 'talk' with the Engine Computer and reveal the proper trouble code. The Denso A/F ratio sensor was close to $100 less than Toyota Dealership wanted, and it arrived (in HI) a week after ordering - ok. All in all, doing my own codes, ordering via Amazon, this repair easily saved me $250 - and took ~ 1 hour total of my time. Time well spent!

Work perfectly

The fact that I could by this Oxygen sensor from Amazon was awesome. It saved me so much money and it's working great.I am a girl and unlike other reviewer who could replace the sensor by themselves, I couldn't. But I used a mobile mechanic and it was much cheaper than going to a toyota dealer or somewhere similar. I totally recommend this product and specially for those unlucky people out there like me, who needs to replace all four oxygen sensors on their car. The auto mechanic that replaced the first oxygen sensor on my car cost me 360$. I bought all the other three oxygens sensors from here and I am glad I could find them here.

ok product

Good quality sensor. Installed and reset check engine light. Works good.

My friend had a check engine light on her 2002 Toyota RAV4. When I scanned the computer, it said that there was a defective oxygen sensor. Ordered this, replaced it, reset the car computer and now the check engine light is off and everything seems to be running as usual.

It worked although it didn’t come with anti-seize compound (thankfully I had some leftover from another sensor).

Works as advertised. Fits in 2001 Toyota Rav4.

Fast shipping, good tracking. Product works as expected, price excellent.