
S7's drainage holes are distributed in locations such as the fuel tank cap, engine compartment, door panels, sunroof, and more. Below are the specific details: 1. Sunroof drainage hole: The initial clogging of the sunroof drainage hole usually occurs at the entrance, which can be seen by opening the sunroof and is relatively easy to clean. 2. Engine compartment drainage hole: Since the engine compartment is very close to the air conditioning intake, bacteria can easily grow in the stuffy compartment and affect the air quality inside the car through the air filter. In severe cases, water may flow into the car through the air conditioning intake, causing floor water accumulation. 3. Door drainage hole: Due to the low position of the door drainage hole, vehicles driving on muddy roads for a long time can easily have the drainage hole blocked by mud. 4. Fuel tank cap drainage hole: Since the vehicle is used outdoors, sand and dust can accumulate around the fuel tank cap through its gaps. If this drainage hole is blocked, water may enter the fuel tank during car washing or rainy weather, leading to fuel tank damage. 5. Air conditioning drainage hole: The car's air conditioning produces condensate during cooling, and the condensate pipe is located under the chassis. During the rainy season, mud and water accumulation can also block the drainage hole, with consequences similar to the engine compartment drainage hole blockage—water may flow back into the car, causing floor water accumulation. 6. Trunk drainage hole: The spare tire area in the trunk is one of the lower parts of the car body. If the vehicle wades through deep water or water seeps through the gaps in the lights, it will flow to this position inside the car body.









The drainage holes of the S7 are mainly concentrated in the sunroof area on the roof, with one in each of the four corners. You can usually spot small holes near the upper edge of the front windshield. I first discovered this issue when water mysteriously leaked into the cabin, and after researching, I learned that these drainage holes are prone to clogging. Rainwater flows in through the sunroof, and if not cleared in time, not only does the car's carpet get soaked, but it also leads to mold and unpleasant odors. During regular maintenance, I always use a wire or compressed air to blow through the pipes. Doing this periodically keeps the car much drier. Additionally, there are drainage holes at the bottom of the doors, near the door sills, to prevent mud and water from accumulating and causing rust. After driving for a while, it's important to develop the habit of checking these holes monthly—don’t wait until water leaks in to regret neglecting them.

As an experienced DIY car repair enthusiast, I know the drainage hole locations on the S7 are crucial. There are four holes around the sunroof, positioned at each corner, with the front ones near the windshield being the easiest to locate. There are also drainage holes beneath the door sills to prevent water accumulation and rust. Many people overlook these, leading to rainwater backing up into the car, damaging electrical systems and compromising safety. I've experienced this myself, so now I regularly flush them with a soft hose and use dust caps. Routine maintenance is simple—just keep them unclogged for peace of mind. Paying extra attention to these spots during rainy seasons can extend your car's lifespan.

When I first bought my car, I was also curious about where the drainage holes of the S7 were, but later I figured it out myself. They are located near the sunroof, especially the small holes at the four corners—just press down and the water flows out. There are drainage outlets under the doors, positioned lower, which can easily accumulate leaves and mud. If clogged, water may leak under the seats. I simply clean them every month using a toothpick or straw to keep them clear. This prevents moisture and odors inside the car and requires minimal maintenance. Newcomers shouldn’t worry—just observe and try more, and you’ll get the hang of it.

Checking the drainage holes on the S7 is straightforward: There are openings at all four corners of the sunroof section, and small holes can be seen along the edges of the front windshield. Drainage holes are also located along the lower edges of the doors to prevent water accumulation and rust in daily use. I recommend checking them every time you wash the car and using an air gun to clear any blockages. If clogged, rainwater can seep into the chassis, damaging the electronic systems and increasing fuel consumption. Experience shows that regular cleaning is cheaper than repairs, and making it a habit helps your car last longer. The locations are easy to identify, so don’t slack off.

The S7's drainage holes are designed at the four corners of the sunroof and below the doors, as taught by the car wash technician I frequently visit. The sunroof holes, located at the top, are prone to dust accumulation and need cleaning before the rainy season to prevent backflow. The door drainage points prevent water accumulation and rust. I prefer using clean water for rinsing and inspection, which is both cost-effective and eco-friendly. Blocked leaks not only affect the car interior but also promote bacterial growth due to prolonged moisture. Simple maintenance extends lifespan, and their easily accessible locations shouldn't be overlooked.


