Don't underestimate these holes, they are actually very important. If these car exhaust holes are blocked, water leakage and water seepage will occur in the car. If the situation is serious, it will cause damage to the mechanical components and the circuit system of the engine. Now I will tell you the location of these drainage holes:
1. Fuel tank drain hole: This drain hole is generally under the fuel tank cover. If it is blocked, it will cause water in the fuel tank and damage the fuel tank when it rains or when the car is washed.
2. Skylight drainage holes: generally located at the four corners of the skylight. Generally speaking, if the car owner does not open the sunroof for a long time, the chances of these drainage holes being blocked will not be great. Don't think that if you don't open the skylight, there will be no water. The reason why the skylight enters is mostly blocked by leaves or garbage. When the car's interior panels get damp, it means that the car's vent may be blocked. Once the sunroof drainage port is blocked, the rainwater will enter the car along the edge of the sunroof. The rainstorm will cause flooding in the car.