
The drainage hole of S6 is located near the bottom of the No.1 pipe. Overview of BYD Auto: BYD is a Chinese automobile brand founded in 1995, mainly producing commercial vehicles, family cars and batteries. Starting with a team of just over 20 people, it grew into the world's second largest rechargeable battery manufacturer by 2003, and established BYD Auto in the same year. Philosophy of BYD Auto: The design of BYD Auto not only incorporates advanced international trends, but also conforms to the aesthetic concepts of Chinese culture. The new BYD logo will no longer use the original blue and white color scheme, but will adopt an elliptical shape with added light and shadow elements.

I've been driving my S6 for five years, and I know the locations of all the drainage holes like the back of my hand. The sunroof has four, one at each corner (front, rear, left, and right) – you can spot these small holes when you open the sunroof. Each door has two or three drainage holes underneath; just lift the rubber seal to find them – leaves tend to clog here during rain. The AC drainage hole is under the chassis on the passenger side, feeling like a small tube. There's also a tiny hole inside the fuel filler flap; just clear it while refueling. Remember to check these spots during car washes, especially before the rainy season. Poking them with a wire works wonders to prevent waterlogging and avoid the hassle of removing seats later.

Last time my S6 sunroof leaked, I specifically researched the drainage hole locations. The small holes in the four corners of the sunroof are most prone to clogging, allowing water to flow down the A-pillar into the car. The holes under the doors often get clogged with mud, causing water accumulation inside the doors when blocked. The AC drain hole is located at the lower right side of the undercarriage - dripping water when AC is on is normal, but reduced dripping may indicate a clog. There's an inconspicuous small hole inside the fuel filler cap that drains accumulated rainwater. I recommend checking these quarterly, especially for cars parked under trees often. Use thin wire to gently clear them, avoiding forceful poking to prevent damaging the tubes.

The drainage holes on the S6 are quite well-distributed. There are plastic holes at the four corners of the sunroof tracks, directly connected to drainage pipes. At the bottom of each of the four doors, there are hidden small square holes. The air conditioning drainage hole is located in the middle of the chassis, slightly to the right, near the front passenger seat. Inside the fuel filler cap, there is a coin-sized diversion groove connected to a drainage hole. For self-maintenance, focus on the sunroof holes; use a syringe to pour water and test for smooth drainage. If blocked, remove the A-pillar trim panel to clean. The door holes can be cleaned by peeling back the rubber seal and using a toothbrush, saving you 200 yuan compared to going to a 4S shop.

I've been cleaning the drainage holes of my S6 for three years. The sunroof holes are at both ends of the sliding rails, and you can unclog them by using a syringe to blow air. The holes under the doors are covered by rubber seals, and you can feel the bumps with your fingers. The air conditioning drainage hole is only visible when you crawl under the car, connected to a white plastic . The fuel filler cap hole is hidden next to the hinge, and a cotton swab can clean it easily. The most frequently clogged are the sunroof holes, as the water hose aging can cause the connection to come loose. Last year during heavy rain, my front passenger carpet got completely soaked due to a blocked rear drainage hole. Now, I open the sunroof every month and pour a cup of water to test the flow rate, which is much easier than fixing leaks.

Before the rainy season, I always check the drainage system of my S6. The small holes at the four corners of the sunroof are connected to near the wheels with soft tubes—if blocked, water seeps from the ceiling. The holes at the bottom of the doors are like little mouths; when filled with dust, they can't spit out water. The AC drainage hole is under the chassis, feeling cool to the touch. The fuel tank cap hole is only visible when the cap is opened. Last time, I found the left rear door drainage hole was clogged—removed the door panel and poured out half a cup of sand. DIY is simple: pour warm water into the sunroof holes to flush, use a toothpick to clean the door holes, and squeeze the soft tube of the AC hole to listen for the sound of water flow. Don’t wait until the car interior gets moldy to deal with it.


