Genuine OEM Volkswagen Door Window Guide Rail, part number 5NN837432B5AP. This essential component is fitted along the upper edge of the door frame, serving to guide the window glass smoothly as it moves up and down. It also acts as a weatherstrip, providing a seal against the elements and reducing wind noise. Measuring approximately 1.31 meters in length and finished in Black (5AP), it weighs 1.859 kg. Choosing a genuine OEM guide rail ensures precise fitment, optimal window operation, and effective sealing, preventing common issues like window rattles or water leaks and maintaining the vehicle's original comfort and integrity.