Genuine OEM Audi Fuel Rail End Cap, part number 03L103113. This component is designed to seal the open end of the fuel rail, preventing fuel leaks and ensuring the fuel system maintains the correct pressure for optimal engine performance. It features a metal plate with an integrated rubber seal for a secure fit. Weighing approximately 0.0235 kg, this cap is crucial for the integrity of the high-pressure fuel system. Using genuine OEM seals and caps ensures proper sealing characteristics and resistance to fuel, which is vital for safety and engine efficiency.