Nissens HVAC Heater Core (745Li 745i 750Li) - 70517 is a high-quality replacement part for the heating and air conditioning system in BMW 745Li, 745i, and 750Li models. It is designed to efficiently transfer heat from the engine to the cabin, providing comfortable and consistent temperature control. Made with durable materials and precision engineering, this heater core is a reliable choice for maintaining the optimal functioning of the HVAC system in your BMW.