Genuine OEM Audi Left Coolant Radiator Hose with Release Coupling, part number 4M0122055CR. This hose is a critical component for the engine cooling system, responsible for transporting coolant between the engine and radiator on the left side. It features a quick-release coupling for efficient installation and a secure connection. Made from durable, reinforced rubber, choosing genuine OEM ensures the correct routing geometry, heat resistance, and coupling integrity, vital for preventing leaks and maintaining optimal engine temperature.