The Genuine BMW A/C Line O-Ring - 64539284019 is a high-quality replacement part for BMW vehicles. This O-ring is specifically designed for use in the air conditioning system and is made from durable materials to ensure long-lasting performance. It helps to seal the connection between the A/C line and other components, preventing leaks and maintaining proper pressure within the system. This O-ring is an authentic BMW product, ensuring a perfect fit and reliable function. It is an essential component for maintaining the efficiency and functionality of your BMW's A/C system.