Genuine OEM Audi Refrigerant Line, part number 4M0816743BD. This critical component is responsible for transporting refrigerant throughout the air conditioning system, enabling efficient cooling of the vehicle's cabin. The line features both rigid metal sections and a flexible hose portion to accommodate engine movement and system connections. Weighing 0.434 kg, it is constructed from materials designed to withstand high pressures and temperature fluctuations. Choosing genuine OEM ensures precise routing geometry, leak-free connections, and compatibility with AC system refrigerants for optimal performance and longevity.