Why is there water leakage in the car?

[McCayden]

The reasons for water leakage in the car are: 1. Clogged sunroof drainage holes: During rainy days, if the sunroof drainage holes are blocked, rainwater cannot drain out and will seep into the car; 2. Aging sunroof rubber seals: Plastic components harden and age over time, and once the sunroof rubber seals age, their sealing performance decreases, leading to water leakage during rain; 3. Clogged air conditioning drainage holes: Condensation water produced by the evaporator cannot drain out and will seep out from the position near the co-pilot seat; 4. Poor door sealing: Incorrect installation or aging and deformation of door seals can reduce the car's sealing performance, causing water to enter the car during rain; 5. Clogged door drainage holes: Due to their low position, door drainage holes are easily blocked by mud, preventing rainwater inside the door from draining out and causing it to seep into the car.