Genuine OEM Skoda Inner Window Aperture Seal, part number 5JJ839479A. This seal is fitted to the inner window aperture on the left side of the vehicle to create a watertight and airtight barrier, preventing water, wind, and noise from entering the cabin. Made from durable, flexible rubber, it is designed for a precise fit within the door frame. Genuine OEM parts ensure the correct material properties and exact dimensions for effective sealing and long-term performance.