Review on 🔧 Improved Denso 234-5430 Air-Fuel Ratio Oxygen Sensor by Michael Santos

I had an engine fault code on my Hyundai Elantra that indicated a bank 1 sensor was stuck lean. I checked for vacuum leaks and couldn't find any, the fuel pump and filter were fine so the next suspect was the oxygen sensor. I was on the verge of buying a few cheap models ranging in price from under $30-$35 and a little over $100. After reading the reviews I decided I wanted something that would last more than a few weeks so I got this one. Direct fit, comes with anti-seize compound, all you need is a suitable socket and torque wrench (about 30 ft-lbs is the correct torque for most vehicles using this sensor size). If the old sensor was over tightened, consider purchasing an M18 tap to secure the threads in the exhaust. In any case, this solved the problem and my car passed the two-year smog test required by California. Let's see how long this lasts.