The Genuine Porsche A/C Line O-Ring Rear (Cayenne) is a high-quality replacement part designed for use in Porsche Cayenne vehicles. This o-ring is specifically used in the rear air conditioning line to ensure a tight seal and prevent leaks. It is made from durable materials and is an authentic Porsche product, ensuring a perfect fit and reliable performance. This o-ring is essential for maintaining the proper functioning of the vehicle's air conditioning system and is a crucial component for optimal comfort while driving.