The Genuine Volvo HVAC Heater Core O-Ring (part number 30676322) is a replacement o-ring for the heating and cooling system in certain Volvo models, including the C30, C70, S40, and V50. This o-ring is designed to create a tight seal between the heater core and the rest of the HVAC system, preventing leaks and ensuring efficient operation. It is made from high-quality materials and is an exact fit for the original o-ring, ensuring proper function and longevity. This product is a genuine Volvo part, meaning it is produced by the original manufacturer and meets all quality and safety standards.