Genuine OEM Audi Lambda Oxygen Sensor, part number 07L906262T. This vital sensor is installed in the exhaust system to monitor the concentration of oxygen in the exhaust gases. Its readings are sent to the engine control unit (ECU), which then adjusts the air-fuel mixture for optimal combustion, fuel efficiency, and reduced emissions. Choosing a genuine OEM sensor ensures precise calibration, accurate signal characteristics, and reliable performance, which are critical for maintaining engine health and meeting emissions standards.