What Causes Water Leakage Under the Co-Driver Seat in a Car?
2 Answers
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.
Last time my car's passenger side leaked water and it really confused me, so I checked it out thoroughly. The most common cause is a clogged AC drain pipe—when it's hot and you turn on the AC, the condensed water can't drain out and ends up pouring inside. If the sunroof drain holes are blocked by leaves or mud, rainwater will flow down the A-pillar into the passenger side. Also, if the door seals are cracked or the drain holes are clogged, rainwater can seep into the door panel and then leak onto the floor mats through gaps. A cracked windshield sealant can also cause leaks. You need to carefully inspect all these areas—best to dry them with a cloth and then place a tissue to test for leaks. Don’t delay, as standing water can damage wiring and make repairs much more complicated. You might even end up having to replace the control module under the seats.
