Is It a Big Problem If Water Gets Inside the Car When You Forget to Close the Window During Rain?

2 Answers
MicahFitz
07/28/25 11:22pm
Whether forgetting to close the window during rain and allowing water to enter the car has an impact depends on the extent of water ingress. Here is a detailed explanation of different water ingress situations: Minor water ingress: If only a small amount of rainwater drifts in, it will not affect the car's wiring system or mechanical system, as the wiring system is protected by covers. Simply clean and dry the wet items. Severe water ingress: Rainwater can enter the cabin, potentially causing malfunctions in electronic devices or rusting some components inside the cabin. Additionally, the passenger side is close to the dashboard, and rainwater is likely to wet electronic devices when entering the car. Even if the electronic devices are not damaged, the seats, floor mats, and other interior parts on the passenger side may still get soaked.
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BenjaminAnn
08/12/25 3:46am
Last time I forgot to roll up the car window, and after heavy rain, the interior got completely flooded. It turned out to be a serious problem. The rainwater soaked the carpets and seats, and if not dealt with promptly, the moisture could seep into the circuit boards beneath the floor, causing short circuits or corrosion. The repair cost me several hundred dollars. Even worse, the next day, mold developed inside the car, creating a foul smell that lingered for a long time. I suggest you immediately use towels to soak up the water, then open the windows for ventilation and let the sun dry it out. If the water accumulation is deep, it’s best to drive to a repair shop for drying and inspection. Make it a habit to check the windows before leaving the car, or install an automatic closing device to save a lot of trouble. Don’t underestimate this water—it hides risks of electrical damage and safety hazards.
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