Genuine OEM Audi Fuel Filter with Pressure Regulator, part number 420201511. This critical component is responsible for filtering contaminants from the fuel before it reaches the engine, protecting fuel injectors and other sensitive fuel system parts. Additionally, it incorporates a pressure regulator to maintain a consistent fuel pressure, which is vital for proper engine combustion and performance. This cylindrical metal filter weighs 0.32 kg and measures 0.15m x 0.08m x 0.08m. Opting for a genuine OEM fuel filter ensures precise filtration efficiency, accurate pressure regulation, and correct fitment within the fuel lines, preventing fuel system issues and maintaining engine longevity.