Is there a relationship between car A-pillar water leakage and the sunroof?

[OGemma]

There is a relationship. There are three main causes of water leakage in the car A-pillar. Below is the explanation: Clogged sunroof drainage holes: Dirt blocks the sunroof drainage outlets, preventing water from draining in time, which then flows into the A-pillar through the conduit interface. In this case, it is necessary to clean the sunroof drainage outlets to ensure they are unobstructed. Poor sealing of the window rubber strips or the fixing holes of the roof rack: In this situation, the sealing strips should be checked, and old ones should be replaced. If the front windshield has been replaced recently, it may be due to uneven application of adhesive on the front windshield: This causes rainwater to seep in through the gaps, requiring the front windshield to be removed and reinstalled with new adhesive.