Genuine OEM Nissan engine anti-evaporation control hose, part number 149123YM1D. This hose is a critical component of the evaporative emissions control system, responsible for routing fuel vapors from the tank to the engine or charcoal canister. It is located in the engine bay, connecting various emission control components. Genuine OEM hoses are designed with specific material resistance and routing to ensure proper function and prevent leaks.