Seller notes

GoldAn ACDelco Professional, premium aftermarket Oxygen (O2) Sensor is the ideal high quality replacement for your GM vehicle. It is a special feedback sensor on your vehicle's exhaust system. This sensor measures the proportion of oxygen in the exhaust gases. Using this measurement, the engine management computer can adjust the air/fuel ratio near the optimum value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. This premium aftermarket replacement o...

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