What Causes Water Leakage Under the Co-Driver Seat in a Car?

[AlyssaAnn]

Water leakage under the co-driver seat in a car is likely caused by a door leak. Below are related explanations regarding water leakage under the co-driver seat: Solutions: If you hear obvious water sloshing sounds when opening/closing the door or while driving, it indicates water accumulation inside the door. In this case, simply use a thin wire or small screwdriver to unclog the drainage holes—this can be easily done yourself. Detailed scenarios of leakage: If the window regulator has been replaced, it may be due to improper adhesion of the door waterproof membrane after the replacement, as the membrane needs to be peeled off during the regulator replacement process. If the waterproof membrane is not properly sealed, heavy rain can cause water to enter the cabin. You can either reseal it yourself or replace the waterproof membrane.