In Demand OES Oxygen Sensor – Before Catalytic Converter (CBFA)

Product Information The oxygen Sensor in your car measures the amount of fuel that is not burned in the exhaust to adjust fuel mapping, cleaner emissions, and for better fuel economy. When the oxygen sensor starts to go bad, your MPG and the performance of the car can suffer due to the fuel it is now lacking. This part can be replaced rather easily and can put your gas mileage and performance back to where it is supposed to be.