Will the sunroof drainage holes get clogged if not opened?
2 Answers
Sunroof drainage holes may get clogged if not opened. Here is some extended information: 1. Location: The sunroof drainage holes in a car are usually located inside the A-pillars and C-pillars of the vehicle. There is a round rubber plug, with one on each side of the rear longitudinal beams, similar to the front. When water enters the sunroof channel, it flows toward the drainage holes and then exits the vehicle through the drainage pipes. 2. Hazards: If the sunroof drainage pipes are clogged, water may flow into the interior, causing water leakage inside the cabin. Once the drainage holes are blocked, issues like water leakage and seepage may occur inside the vehicle, potentially damaging the interior panels in minor cases or leading to mechanical component and engine circuit system damage in severe cases. Therefore, it is essential to keep the sunroof drainage pipes clear and perform regular maintenance on the sunroof.
I've encountered many car owners complaining about sunroof leaks, but the root cause is actually clogged drainage holes. Even if you never open the sunroof, debris can still accumulate in the drainage channels. During rain, water seeps through the sunroof gaps, and when parked outdoors, wind-blown dust, leaf fragments, and dead insects gradually clog the drainage channels near the outlets. The worst clog I've seen was when mud completely sealed a drainage hole, causing water to leak directly into the car—ultimately requiring removal and drying of the headliner. I recommend having technicians clear the drainage holes with compressed air during biannual maintenance. Don't wait until mold forms or leaks appear to regret neglecting this.
