Genuine OEM Audi NOx Sensor, part number 05N907807A. This advanced sensor is vital for modern emissions control systems, precisely detecting nitrogen oxide levels in the exhaust gases. It is typically installed in the exhaust system, providing real-time data to the engine control unit. Weighing approximately 0.28 kg, the sensor assembly has a length of 0.85m, including its wiring. Using a genuine OEM NOx sensor ensures accurate readings, correct signal characteristics, and seamless integration with the vehicle's complex emissions management system, preventing false codes and maintaining regulatory compliance.