The Vemo NOx Sensor - V20720146 is a product designed to measure the levels of nitrogen oxides (NOx) in a vehicle's exhaust system. It utilizes advanced technology to accurately detect and monitor NOx emissions, which is an important component in reducing harmful pollutants from vehicles. This sensor is specifically designed for use in diesel engines and is compatible with a wide range of vehicle models. It is a high-quality, reliable and durable product that helps ensure compliance with emissions regulations and promotes cleaner air.