The Saturn LS Oxygen Sensor is one of the high-tech devices used by the modern exhaust system. Its purpose is to work with the fuel injectors to maximize fuel economy. Essentially, it does the job of the old choke knob.

The difference is that a choke knob required a good deal of experience and fallible human intuition in order to achieve the ideal fuel mixture for driving conditions at any given moment. The problem is that driving conditions can change from one moment to the next.

By "sensing" the amount of oxygen present in the exhaust gases, the Saturn LS Oxygen Sensor can determine the ideal fuel-air mixture for driving conditions at any given moment. It sends this data to the fuel injectors by means of a series of electronic signals. Based on this data, the fuel injectors respond by adjusting the amount of fuel delivered into the cylinders. The result is a more efficient use of gasoline; in fact, many of today's V8 engines can deliver more horsepower and use substantially less fuel while doing it than a four-banger of sixty years ago. Oxygen sensors can become defective, over time. Because of their location on the underside of the vehicle, most of the exhaust system components can take a real beating. If your Saturn's exhaust is starting to smell like sulfur and you're experiencing a significant drop in fuel economy, there's a good chance your Saturn LS Oxygen Sensor is not working properly. When that happens, come see us - we will meet or beat any online competitor's price on the entire range of Saturn parts and accessories.Order online or call us toll-free, 24/7!