There are four o2 sensors located in the 2008 dodge avenger. two are located on the upstream and two on the downstream side of the catalytic converter. these sensors are responsible for maintaining the fuel efficiency of the car. a faulty o2 sensor is one of the most common reasons for the illumination of the check engine light. other symptoms may include a decrease in fuel efficiency, rough idling or mis firing from the engine. if you ever encounter any of these symptoms, you should take your car to a workshop right away, and get the faulty sensor replaced. the replacement for a dodge avenger oxygen sensor will cost you between $ 185 and $ 220.
The 2008 dodge avenger has four o2 sensors. there are two upstream and two downstream from the catalytic converter.