Genuine OEM Audi Engine Oil Filler Cap, part number 06K103485C. This cap provides a secure seal for the engine oil filler opening, preventing contaminants from entering the engine and oil from leaking out. It is a durable plastic cap, weighing 0.0306 kg, featuring clear oil symbols for easy identification. Using a genuine OEM cap ensures a precise fit, proper sealing, and resistance to engine heat and oil, which is critical for maintaining engine cleanliness and preventing costly oil leaks.