Kia Sephia Oxygen Sensor

Hi My Question Relates To O2 Sensors- I Have A Post Cat O2 Sensor And A Precat O2 Sensor, Which One Gets The Most Wear(use) And Usually Goes...

Hi Will A O2 Sensor Smooth Out A Rough Running Engine- Haven't Had A Working One In For About 2 Months-had To Replace The Front Cat./front...

The Car Wont Go Until After A While Ii Dont Know If Its The Oxygen Sensor Or A Circuit Or Something Else, They Told Me At Autozone That It...