🔍 Denso 2344261 O2 Sensor Review

Fits 2001 Toyota 4Runner. This is the downstream O2 sensor on the bottom coil. The top sensor is the A/F sensor (about $100 more). I replaced both sensors and the MAF to clear the codes. The problem started with the check engine light and the VSC/TRAC light coming on. 1. Vacuum leak test. Clean the MAF and replace the sensors last.

Just replaced my old one with this one. The Check Engine Light (code 1155) will go out when the engine is first started. Also included is a small tube of anti-seize paste. It is very easy to replace it yourself. Just need a wrench and some WD-40 to loosen the old one. This part was a lot cheaper than its counterpart at Advanced Auto Parts and it was delivered same day for free.

I don't mind paying $50, but it has to be an OEM. Check your sensors with the picture in the list. The sensor came in a box, without a box, with numbers and a "rescued from the basket” sticker. None of the numbers matched the part here. There is no Denso designation anywhere. There are no blue wires like in the photo. The recesses in the sensor are different. The socket has different metals. He comes back. Look closely at my photos. Buyer Warning.

Bought for my 01 4Runner 4WD. After driving 295,000 miles I came across CEL codes. I swapped the upflow and downflow sensors 02. The problem did not recur. You will need a good 22mm box wrench or a deep wrench with a broken rod. Depending on driving conditions, this knot can get quite tight. I was able to use an allen wrench and a PB blaster to take it off. Along with that sensor, they deliver some anti-size copper. USE IT! The job was pretty easy once the sensor was detached.

Fits perfectly on my 2001 Toyota 4Runner SR5 with 190,000 miles. I replaced the front A/F sensor about 6 months ago because the check engine light was on. The CEL tripped and then came back with a P0420 code so instead of replacing the cats I replaced that O2 sensor. There is no light yet. I sprayed a PB blaster a few days before attempting to remove the old one, and it came out pretty easily. I was able to use a 22mm open end wrench. I had enough room to turn the wrench to break it. If you are

I have a 2002 4runner code P0420. The Check Engine, VSC and TRAC OFF lights came on. Both the air/fuel sensor and this O2 sensor and cat were original. I started by just swapping this out thinking I'd do an upstream air/fuel gauge when the light came back on. I replaced this sensor and cleared the codes and they never came back. Didn't have to make a top gauge or a cat! Driven about 7000 km, satisfied. Just remember to spray the old one with penetrating lube every day for a week before…

The Toyota dealer wanted $180-210 (they weren't sure on the phone lord) for the same part. Literally the same part. Denso is OEM for Toyota. In fact, Toyota owns 25% of Denso. Many aftermarket sensors fail quickly, which is why I wanted to switch to OEM. Glad I checked Amazon. My mechanic told me he could install it for $100. The cost here was $45. When I opened it up it looked pretty easy to install, so I slid under a truck and installed it in less than 10 minutes. The Check Engine light went…

I used this to replace the original factory sensor in my 2001 4Runner with over 260,000 miles on it. This sensor fits perfectly in the exhaust pipe without any modifications. The OBD-II status shows "OK" after it's installed and it's been working great for over 5000 miles. I hope it lasts another 1/4 million miles! For those replacing themselves, please prepare for a little effort to remove the old sensor. I've soaked mine in PB Blaster multiple times over several days, but it still won't budge

After reading all the reviews and comments I realized this was the easiest solution for my car! The engine and traction indicator lights came on and I replaced the gas cap a few years ago so it can't be the cap. I took my car to the local auto parts and checking the engine code showed a bad O2 sensor. The clerk told me what they had in stock and it would cost $180.00. However, after a few minutes he told me that this is a special order and will take 2 days. They've done this to me in the past…