Where Does Water Enter from the Car's Passenger Side?
2 Answers
Water under the car's passenger seat can be caused by the following reasons: 1. Clogged sunroof drainage holes: Sunroof drainage holes are easily blocked by leaves and dust. Once clogged, rainwater cannot drain promptly during rainfall and may seep into the car interior. 2. Aging sunroof rubber seals: Rubber components harden and deteriorate over time. When the sunroof's rubber seal ages, its sealing effectiveness decreases, leading to leaks during rainy days. Additionally, during sunroof maintenance, using high-pressure water jets or strong acidic/alkaline cleaners can deform and accelerate the aging of the sunroof's rubber seals.
I often help friends check for water leaks in their cars. If there's water under the passenger seat, it's most likely due to aging or damaged door seals. The rubber strips along the door edges can harden and crack over time, allowing water to seep in during rain. This is especially common for the passenger-side door, which undergoes more wear from frequent opening and closing. Additionally, the seals around the window regulators may not fit tightly, letting rainwater seep through gaps. Using a high-pressure washer during car washes makes it easier to spot leaks. For older cars, it's essential to regularly inspect the seals and replace any damaged ones promptly. Otherwise, water can accumulate under the floor mats, leading to mold, unpleasant odors, and even corrosion of metal components. Addressing this issue early can save a lot on repair costs.
