Genuine OEM Volkswagen Flex Fuel Sensor, part number 06K907811B. This sensor is integrated into the fuel system to accurately monitor the ethanol content in the fuel, enabling the engine control unit to adjust fuel delivery and ignition timing accordingly. It is located within the fuel line assembly. Weighing approximately 0.086 kg, this sensor provides crucial data for engines designed to run on varying ethanol blends. Choosing a genuine OEM flex fuel sensor ensures precise and reliable fuel composition analysis, which is vital for maintaining optimal engine performance, fuel efficiency, and emissions compliance across different fuel types.