Genuine OEM Audi vacuum hose, part number 07L133789A. This hose is a vital component of the vacuum system, responsible for routing air or vacuum pressure to various engine management components. It is engineered for specific routing to maintain system efficiency and prevent vacuum leaks. Genuine OEM vacuum hoses are constructed from high-grade, heat-resistant rubber compounds that resist cracking and collapse under engine bay conditions, ensuring consistent signal delivery and long-term system reliability.