The Delphi Porsche Oxygen Sensor - ES10399 is a high-quality, direct fit replacement sensor for Porsche vehicles. It is designed to accurately measure the oxygen levels in the exhaust gases and send this information to the vehicle's engine control unit. This allows the engine to adjust its air-to-fuel ratio for optimal performance and reduced emissions. The sensor is made with durable materials and undergoes strict testing to ensure reliability and longevity. It is compatible with a wide range of Porsche models and is easy to install.