What Causes Water Leakage in the Front Passenger Side of a Car?

1 Answers
VonJude
07/30/25 1:42am
Water leakage under the front passenger seat of a car is likely caused by a door leak. Below are details regarding water leakage under the front passenger seat: 1. Solution: When opening or closing the door, or hearing noticeable water sloshing sounds while driving, it indicates water accumulation inside the door. In this case, simply use a thin wire or a small screwdriver to unclog the drainage hole. This is something you can easily handle yourself. 2. Detailed Scenario of Leakage: If the window regulator has been replaced, it might be due to improper adhesion of the door's waterproof membrane after the replacement. Replacing the regulator requires peeling off the waterproof membrane, which can lead to poor resealing. During heavy rain, this can cause water to enter the car. You can either reseal it yourself or replace the waterproof membrane.
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