PREMIUM POST CATALYTIC OXYGEN O2 SENSOR TO SUIT FORD FALCON FG FG X DURATEC 2.0L I4Premium post cat O2 sensors are manufactured utilizing proven OE technology and are guaranteed to provide durable and efficient performance. The Post catalytic oxygen sensor is located after the catalytic converter and monitors its efficiency by comparing the exhaust that flows into the and out of the converter. This sensor ensures the lowest possible output of environmentally harmful engine emissions. This Post cat oxygen sensor suits Ford vehicles