Genuine OEM Audi Lambda Oxygen Sensor, part number 8W0906262N. This vital sensor is installed in the exhaust system, where it precisely measures the oxygen content in the exhaust gases. The data it provides is critical for the engine control unit to optimize the air-fuel mixture, ensuring efficient combustion and effective emissions reduction. Opting for a genuine OEM oxygen sensor guarantees accurate readings and proper integration with the vehicle's complex engine management system, preventing false codes and maintaining optimal performance.