Genuine OEM Audi Oil Filter Housing Cap with Seal, part number 038117061B. This component is essential for securing the oil filter within its housing and creating a leak-proof seal, which is critical for maintaining engine lubrication. It typically includes an integrated O-ring for a tight fit. Weighing 0.229 kg, the cap is made from durable plastic, while the central shaft is metal. Using a genuine OEM oil filter housing cap ensures correct thread engagement, proper sealing, and material resistance to engine oil and temperatures, preventing costly leaks and engine damage.