First of all, the sealing strip of the door is not tightly sealed, which leads to water leakage of the door;

Second, the water outlet under the car door is blocked, which hinders the outflow of water;

Third, the waterproof membrane inside the car door breaks, causing water to flow directly to the threshold and then to the foot pad.

2. In view of the problem that the door sealing strip is not tightly sealed, check whether your sealing strip is seriously damaged or deformed. If yes, please replace it with a new one. If there is nothing wrong, adjust the door inward, so that the contact between the door sealing strip and the door will be closer and the water will not leak in easily!

3. In view of the problem that the water outlet of the car door is blocked, we gently pull the rubber strip under the car door, and you will see a square water outlet. If your car is not cleaned for a long time, you should accumulate some silt and sundries, and use a screwdriver to clean up all the clogged sundries so that the water can be discharged!

4. It is complicated to solve the problem that the waterproof membrane inside the car door is broken. Sprinkle some water on the glass first, then open the car door to see if there is any water leakage.

5. Take out the t-20 spline and the t-30 spline, and remove the door trim panel of the leaking door with a screwdriver, and you will see that there is a plastic film inside. This waterproof film is glued to the door panel with a seal. Because of the dust, the sealant is opened and the waterproof membrane can't stick, so the water will flow to the threshold through the gap, accumulate more and more, and finally flow to the car, so in this case, change the waterproof membrane.