Is it normal for a car sunroof to leak water?
2 Answers
Sunroof leakage is normal as long as the water can drain properly and does not drip into the cabin. Here is an introduction to sunroof leakage issues: Dust and debris falling into the tracks: If the sunroof drain pipe is clogged and cannot drain excessive rainwater, water may seep into the cabin through the sunroof's waterproof seal. This issue can usually be resolved by using a thin wire to unclog the drain pipe. Deformation of sliding tracks: Track deformation typically occurs when movement is obstructed, forcing the motor to move back and forth, causing stretching and deformation. This results in the sunroof glass not closing properly, allowing rainwater to enter the cabin. If there are no separate track components available, the entire sunroof frame assembly may need to be replaced. Broken lifting arms: When the sunroof slides to the front and closes, if the lifting arms are broken, the sunroof cannot rise to be level with the roof, creating a depression where rainwater can leak into the cabin along the edges. In this case, replacing the entire frame assembly is necessary to resolve the issue. Aged waterproof seals: Particularly in vehicles over 10 years old, aged seals may not form a tight seal with the roof, allowing rainwater to seep into the cabin.
A sunroof leaking water is not normal and needs to be checked immediately. I've repaired many cars, and the common causes are aging or hardening of the sealing rubber strip; over time, the rubber strip shrinks, allowing rainwater to seep in. Clogged drainage holes are also a troublesome issue; dust and fallen leaves accumulate, preventing water from draining and causing it to pool in the sunroof tracks. In terms of design, sunroofs should have a waterproof layer, but it can develop problems over time. Minor leaks might occur during heavy rain, but if the roof gets wet, it's definitely not normal. It's recommended to inspect it as soon as possible: first clean the drainage holes, then replace the rubber strip. Otherwise, mold in the interior or electrical short circuits could lead to more expensive repairs. Develop a habit of cleaning the sunroof tracks before every rainy season to prevent such issues. Don't delay—safety comes first.
