Genuine OEM Audi Refrigerant Hose, part number 5Q2816738N. This hose is a critical component of the air conditioning system, responsible for carrying refrigerant and incorporating an internal heat exchanger. It is located within the air conditioning assembly. This part is constructed from materials designed to withstand refrigerant pressure and temperature fluctuations. Genuine OEM parts are essential for the precise calibration and longevity of your vehicle's climate control system.