2019-2023 BMW Z4 Door Window Glass Channel / Seal Front, Left 51337429635

The Front Left Door Window Glass Channel/Seal is an essential component for the BMW Z4 (2019-2023), ensuring a snug fit for the window glass. This OEM part, with associated part numbers including Bosch 7429635, is critically located along the inner edge of the door frame, providing a secure guide for the window as it opens and closes. It prevents wind noise and water leaks, maintaining the interior's comfort and integrity. Common scenarios for replacement include visible wear, cracks, or damage to the seal, leading to improper window sealing or rattle noises during operation. This part is also known as the window guide or window weatherstrip. Ensure proper fit and function by replacing with this genuine manufacturer's part, sourced directly from salvage vehicles.