Is It Normal for Car Doors to Let in Water When It Rains?

[StellaLynn]

It is normal for car doors to let in water when it rains, as doors are equipped with drainage holes that allow water to exit quickly. Below are some precautions for driving in the rain: 1. Reduce speed: Regardless of road width or condition, drive slowly in the rain and always be aware of the distance between your vehicle and others, preparing in advance for any emergency measures. 2. Maintain distance: Rain can obstruct visibility, so it's important to keep a safe distance from other vehicles and constantly monitor the space between cars. 3. Use fog lights: Make full use of fog lights to enhance driving safety in the rain. If necessary, turn on hazard warning lights to alert vehicles behind you to your movements. 4. Do not restart if the engine stalls: During heavy rain or storms, some areas may flood quickly. If you must drive through water, do so at a steady speed in a low gear. If your vehicle stalls, do not attempt to restart it immediately, as doing so could severely damage the engine.

[Emiliano]

Last time I went to the repair shop to pick up my friend's car, I happened to hear the mechanic mention this. It's actually quite normal for water to seep through the door seams when it rains, as car doors are designed with drainage channels. If you look at the bottom edge of the door, you'll notice there are slender drainage holes. Rainwater that flows into the door lining through the window gaps will drain out through these small holes. My decade-old car always drips a few water droplets from the door seams after rain, but the carpet never gets wet. It's especially important to regularly clean leaves and debris near the drainage holes. Not long ago, a colleague's car had its drainage holes clogged with dead leaves, causing rainwater to soak and damage the window regulator motor, costing several hundred dollars in repairs.

[Eddie]

When I first bought the car, I was startled too! While washing the car, I noticed water marks in the door panel gaps and rushed to the 4S shop in a panic. The technician just smiled, used a key to poke open the rubber plug at the bottom of the door, and water gushed out. Now I understand—the door has a double-layer steel structure, and the drainage channels in the sandwich layer naturally collect and drain rainwater. But if you find the carpet damp or water pooling at the door sill, it’s time for a check—most likely due to detached waterproof film or aged seals. Handling it yourself is simple: use a towel to soak up the water in the sill, and when air-drying, remember to open all four doors for ventilation.

[Scott]

As a car owner who frequently drives to construction sites, my car doors often get splashed with mud and water. From a design perspective, the preset drainage holes at the bottom of the door are approximately 5mm in diameter and positioned lower than the inner steel panel. It is normal for rainwater to enter the door cavity, collect through the drainage channels, and eventually drain out through these holes. Pay special attention to three areas: whether there is water accumulation in the door storage compartment, any water stains around the window switch, and if the rear foot mats show discoloration or mold. Last month, the left rear door of my car accumulated water inside the door panel due to a deformed seal, causing the window to operate with hesitation and unusual noises.

[DeElliott]

Quick Tip: After parking, tilt the car body slightly. If water flows out from each door in turn—this is normal. If a door doesn't drain water but you find dampness on the floor mat—this indicates an issue. Focus on three key areas: Check if the outer weatherstrip adhesive is peeling, inspect the door frame's waterproof membrane for damage, and ensure the drainage holes aren't clogged with mud. Last week, my SUV had water accumulation in the front left door. Upon removing the door panel, I discovered the waterproof membrane sealant wasn't evenly applied during the last speaker replacement.

[VonLogan]

As a mom who drives her kids to school every day, the most annoying thing is the water dripping when opening the car door on rainy days. The mechanic taught me a trick: after rain, open the car door and check if the sealing rubber strip is sticking together. If it separates easily, it means it's in good condition. Shine a flashlight on the door frame; if there are continuous water droplets hanging on the metal groove, it's a normal condensation phenomenon. Don't be silly like me and seal the drainage holes with plastic wrap! Last month, the car carpet was soaked because there were three holes chewed by insects at the end of the sunroof drain pipe. Now, every time I get maintenance, I ask the technician to clean the holes, and before rainy days, I check the color of the floor mats—dark water stains are a warning sign!