What Causes Water Leakage from the Right A-Pillar of a Car?

[McCameron]

Water leakage from the right A-pillar of a car can be caused by clogged sunroof drainage holes, poor windshield sealing, or inadequate vehicle sealing. Clogged Sunroof Drainage Holes: If the drainage holes of the car's sunroof are clogged, rainwater that falls on the car cannot be drained in time, causing the water to flow along the interface of the conduit into the interior of the A-pillar. The solution is to unclog the blocked drainage holes. Poor Windshield Sealing: After replacing the windshield, if the adhesive is unevenly applied, the car's sealing performance will decrease, allowing rainwater to seep into the car through gaps. If the windshield has not been replaced, it is likely that the sealing strip has aged, leading to leakage. The solution is to replace the windshield and the sealing strip. Inadequate Vehicle Sealing: This can be due to aging window sealing strips or poor sealing of the roof rack mounting holes. Over time, the window sealing strips can harden and age, reducing the window's sealing performance. Additionally, if the mounting holes for the roof rack are not properly sealed during installation, water leakage can occur. The solution is to replace the window sealing strips and improve the vehicle's sealing.