Genuine OEM Audi Fuel Filter with Regulator, part number 1K0201051L. This critical component is designed to filter impurities from the fuel, protecting sensitive fuel injectors and engine components. It also integrates a pressure regulator to maintain consistent fuel pressure for optimal engine performance. Measuring approximately 0.175 meters in length, a genuine OEM fuel filter with regulator ensures precise filtration efficiency, accurate pressure regulation, and reliable operation for the entire fuel system.