Genuine OEM Volkswagen Nox Sensor, part number 04L907807AP. This critical sensor is responsible for accurately measuring nitrogen oxide (NOx) levels within the vehicle's exhaust system. Its data is vital for the engine control unit to manage emissions, optimize combustion, and ensure compliance with environmental regulations. Weighing 0.335 kg, this genuine OEM sensor provides precise and reliable readings, which is essential for maintaining engine efficiency and preventing costly emissions-related issues.