Review on 🚀 Denso 234-4445 Oxygen Sensor: Advanced Air-Fuel Ratio Monitoring for Optimal Performance by Saradhi Suter

Ever since I bought this car (used) there has been constant knocking in the engine even though the knock sensor has been replaced with higher octane fuel etc. Then one fine day check the engine light came on indicating a bad rear sensor, followed by an almost complete engine shutdown on lift off (yes it's a manual transmission). I bought this part and installed it myself and voila, the engine knock is gone and the dead center start is better than ever. Also noticed improved MPG and acceleration. I am very satisfied with the result. And yes, the rear oxygen sensor is tricky to get to, but doable. I also bought a special socket for removing/installing the sensor.