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The sunroof seal creates a watertight and wind-noise-free barrier between the sliding or tilting glass panel and the roof aperture. As rubber ages it hardens, cracks, and compresses permanently, allowing water to seep into the headlining and wind noise to intrude at motorway speeds. A Seal, sunroof replacement resolves both problems and prevents costly headlining and electrical damage from water ingress. CarParts247 stocks sunroof seals from Febi Bilstein and URO Parts for popular European makes including BMW, Mercedes-Benz, Volkswagen, and Audi.
Water leaks from a degraded sunroof seal typically appear as damp staining on the headlining above the front seats or as moisture accumulating in the seat-belt anchor recess. Wind noise is often the first symptom because cracking begins before the seal loses its watertight property.
Before replacing the seal, check that the sunroof drainage channels are clear. Most sunroofs have four drain tubes at the corners of the aperture that route water into the sill cavities. Blocked drains cause water to back up and overflow the seal regardless of its condition. Use a thin flexible wire or compressed air to clear the drains before fitting the new seal.
The seal usually clips or slides into a groove around the aperture perimeter. Remove the old seal, clean the groove with a damp cloth, and press the new seal into the groove starting at the front centre. Where the seal ends meet, use a small amount of rubber adhesive to secure the join.
Commonly searched OE numbers fitting Sunroof Seal from the TecDoc catalogue.