Enhance Engine Efficiency with Denso 234-4077 Oxygen Sensor Review

Easy installation including much needed anti-seize paste. Works perfectly, delivery in one day which is not perfect.

Incorrect connection. It's only downstream, not upstream as Amazon says. Had to go to a local to get it right and I'm stuck on this one!

This worked great as a replacement for my 1997 Jeep Wrangler TJ 4 Cylinder Engine which was sending out an O2 sensor code. Immediately understood! It comes with a small pack of anti-seize agent in the box, so use it! Oh, you don't need to use any special tool to uninstall/install this (as mentioned in the manual). An open-end wrench or even an adjustable wrench will do.

I installed this sensor and it did not work properly, the OBD2 signals are incorrect and the error code indicates a faulty upstream sensor. I didn't see an option to return it and when I tried to contact the seller they didn't provide any contact information. I would not buy from this seller again. It would be nice to be able to return this defective sensor and get a working one.

I left my check engine light on for about 100,000 miles, ran the code and it came back with an emissions code - it occurred to me it was catalytic efficiency. I figured I'd try replacing the sensors before spending the big bucks on a catalytic converter. Well it worked. It's been 2 years and the check engine light hasn't returned! Note: I swapped the front and rear sensors. It was a no-brainer, not my truck. only lasted 30 minutes or so.

This worked great for my 1998 Dodge Dakota 3.9L V6. My truck had a check engine light on, I hooked up a code reader and it was an "upstream" O2 sensor. The truck ran terribly rich and idled very rough. Installed this Denso sensor, cleared the code and the truck is running great now. The installation went very smoothly. And it connected perfectly to my factory wiring. So for less than half the price of my local parts store and it works great, who could ask for more. Good product.

Handling Problem Solved After 30 seconds my newly purchased 1997 Jeep Wrangler TJ ran rough and wobbly for another 30 seconds. This is actually quite dangerous as you don't want to get stuck in traffic and stall. The previous owner just lived with the problem, but I wanted to find a solution. The solution was the Denso upstream oxygen sensor. The old oxygen sensor was sending incorrect data to the computer, causing the air/fuel ratio to be incorrect for a short time until the engine warmed up…

Denso is perfect for your Chrysler vehicle. The only problem is that Revain said it would work for the top sensor on my 1996 Dodge Ram truck. It's not Revains' fault as every other auto parts website says the same thing. I ordered it and found that it is about 2 cm shorter. It has a wire length of 12 inches. My original is about 14 inches long. I have learned that there is an alternate part 234-4076. It's the exact same part but it's an 18" wire length with the same pigtail (this was another…

I have no problem changing the oxygen sensors, it's a simple procedure that only requires a couple of ramps to raise the car (can also be done with jacks and stands); They were pretty affordable so removing them wasn't a problem. The plug connections were a bit difficult to loosen, one of them was held by a plastic pin on the side of the gearbox and could be squeezed vigorously by hand. to remove it. I made sure I secured the cables and connectors in one place. They are tight, these cables run…