What Causes Water Leakage in a Car?
2 Answers
Water leakage in a car mainly includes door leaks, sunroof leaks, and trunk water accumulation. Below are the relevant explanations: 1. Door leaks: Usually caused by aging window waterproof strips or clogged door drainage holes. Door leaks can result in water seeping out from the door trim panels, and in severe cases, water may accumulate under the cabin carpet. 2. Sunroof leaks: In most cases, this is caused by clogged sunroof drainage holes. Sunroof leaks can lead to wet headliner panels, and in severe cases, water may even "pour" from the sunroof into the cabin. 3. Trunk water accumulation: Generally caused by poor sealing of the trunk weatherstrip or tail light seals.
Water leakage in cars is quite common, especially after rain or car washes. I've encountered it several times and found the main issue lies with the sunroof. Leaves and mud can easily clog the sunroof drainage holes, causing water to seep into the car through gaps when it can't drain properly. Another problem is aging door seals—if they don't seal tightly, water can seep down the door panels and under the floor mats. Last time, my passenger side had standing water, and it turned out the AC drain hose had come loose, letting all the condensation leak into the cabin. If the windshield has been replaced, poor sealant application can also cause leaks. Trunk leaks are often due to deformed seals or faulty drain plugs. Untreated leaks can lead to mold and mildew, which is a nightmare—so it's best to regularly clean drainage holes, especially before the rainy season.
