How to Deal with Clogged Sunroof Drain Holes in BYD S7?
4 Answers
Using a syringe connected to an infusion tube to flush the drain pipe should be able to clear the blockage. This method is very effective and simple to perform. Go to a tire replacement location, take an air gun, aim it at the drain holes of the two front drain pipes inside the sunroof, and use high-pressure airflow to blow through the drain pipes.
Last year when I was driving my BYD S7, I encountered a clogged sunroof drain issue. After heavy rain, water leaked into the cabin, soaking the carpets and leaving water stains. Later I realized it was because I parked under a big tree—leaves and dust had completely blocked the drain hole. I carefully unclogged it using a thin wire and tested the drainage flow by flushing the pipe with a water bottle, finally solving the problem. Since then, I make it a habit to clean the sunroof tracks during every car wash to prevent blockages—saving both money and hassle. I also avoid parking under trees now, as delayed unclogging could lead to moldy interiors, which would be a nightmare to repair.
I have some experience dealing with clogged sunroof drains and enjoy tinkering with cars myself. The BYD S7's drain holes are located at the corners of the sunroof, which are prone to debris blockage. I first use a vacuum cleaner to remove debris from the tracks, then test the drains by blowing air or flushing water through a soft tube. If the water doesn't flow, I carefully use a thin metal wire to clear the pipe, being cautious not to damage any components. For prevention, I recommend checking monthly and avoiding opening windows in hot weather to prevent insects. Neglecting this could lead to leaks into the interior and affect electrical systems—I've seen a neighbor spend a fortune repairing their AC system due to this issue.
I've driven a BYD S7, and a clogged sunroof drain hole can be easily fixed. First, use a small brush to remove leaves and dirt around the sunroof, then gently clear the hole with a thin stick or wire. Pour some water to test if the flow is normal. Once unclogged, fast water drainage prevents leaks from damaging the seats. Make it a habit to spend a minute cleaning after each car wash—it's crucial. Parking away from trees reduces debris and avoids trouble.
