Genuine OEM Volkswagen Heat Exchanger Gasket, part number 7T0819109. This gasket is designed to seal the heat exchanger, preventing fluid leaks and maintaining system integrity. It is typically installed around the heat exchanger unit. Made from durable foam material, it measures approximately 0.18m in length. Using a genuine OEM gasket ensures a precise fit and proper sealing, critical for preventing costly leaks and maintaining HVAC system efficiency.