What are the reasons for water on the front passenger floor?
2 Answers
Reasons for water on the front passenger floor: 1. The sunroof itself has leakage points, causing poor sealing; 2. The sunroof drain hole is clogged or detached, preventing water from draining outside the vehicle; 3. The vehicle drove through a waterlogged area with deep water, leading to water entering the cabin; 4. Poor sealing of the vehicle body. Additional information: If there is water under the carpets, on the driver's side, front passenger side, or under the rear seats, it is essential to promptly address the water that has entered beneath the floor mats or carpets. Failure to do so may result in mold growth inside the vehicle and damage to the wiring harness or control units. Depending on the severity of the water ingress, remove all seats from the cabin. Take out the floor mats, carpets, and other components. Deal with the moisture inside. Dry the carpets and floor mats thoroughly. Replace any damaged control units.
Water on the front passenger floor might be related to the AC system. In summer, if the condensate can't drain properly due to clogged pipes, it leaks onto the floor. Aged door seals can also let rainwater seep in, especially after the rainy season, causing accumulated water that may lead to mold and corrosion, affecting interior electronics. A faulty heater core leaking coolant is more troublesome—it's sticky and has a sweet smell, requiring immediate attention to prevent rust. Last time I helped a neighbor check, it turned out to be leaves blocking the AC drain; clearing them fixed the issue. I recommend regularly inspecting drainage tubes during car washes—don't underestimate this potential hazard.
