Are the Drain Holes on New Car Doors Open by Default?
2 Answers
No, they are not open by default. Generally, the drain holes on new cars are blocked with tape or other materials. After purchasing a new car, it is essential to promptly check the drain holes on the doors to ensure they are open. If the drain holes remain closed, water can accumulate inside the doors during rain or car washes, leading to rust over time. Here is some information about drain holes: 1. Introduction One: There are many drain holes on a car, and they usually come with rubber plugs. These plugs should generally be removed to facilitate proper drainage and extend the vehicle's lifespan. 2. Introduction Two: Each door typically has two or more drain holes, usually located at the bottom of the door panel. If these plugs are not removed, water can accumulate inside the door, causing rust over time. Additionally, the door contains various components, such as window regulators and wiring for the car audio system, which can be damaged if exposed to water. 3. Introduction Three: Since the drain holes on doors are positioned low, they are prone to clogging with mud when driving on muddy roads. Therefore, it is important to clean the drain holes on the doors regularly.
When I first got my new car, I also wondered about this issue and specifically asked the experienced technician at the 4S dealership. He said that every new car comes from the factory with the drainage holes at the bottom of the doors open by default, otherwise rainwater accumulating inside the doors would cause rust. I’ve personally felt the bottom of the doors—there are about four small holes located just below the weather stripping, which you can detect with your fingers. However, these holes are particularly prone to getting clogged with mud, sand, or leaves, especially for cars parked under trees. My neighbor’s car had its drainage holes blocked, and during rainy days, the doors would accumulate so much water it was like raising fish inside—eventually costing nearly a thousand yuan to repair the window regulator. Now, whenever I wash my car, I use a thin wire to clear out the drainage holes to ensure they remain unobstructed. It’s best to check these holes yourself when you buy a new car, as some protective films applied during transport might cover them.
