Genuine OEM Audi EGR Vacuum Hose, part number 03L131055AM. This small but critical hose is responsible for transmitting vacuum pressure to the Exhaust Gas Recirculation (EGR) valve, enabling its proper operation. The EGR system is vital for reducing nitrogen oxide emissions and optimizing combustion efficiency. Weighing approximately 0.008 kg, this hose is designed for precise fitment and reliable performance under engine bay conditions. Using a genuine OEM vacuum hose ensures the correct material flexibility, resistance to heat and fluids, and a secure connection, preventing vacuum leaks that can impair EGR function and lead to increased emissions or engine issues.