Genuine OEM Volkswagen Oil Filler Pipe, part number 4M0115301Q. This pipe provides a dedicated and sealed access point for adding engine oil to the lubrication system, preventing spills and contamination. It connects to the engine block or valve cover, leading to the oil sump. Constructed from durable, heat-resistant plastic, it is designed to withstand engine bay temperatures and oil exposure. Using a genuine OEM oil filler pipe ensures a perfect seal, correct routing, and material integrity, crucial for maintaining engine cleanliness and preventing oil leaks.