Take a look at the door glass… See that rubber wiper between the glass and the edge of the door? If water can get past that seal and into to doors, and the drains in the doors are plugged up, the doors fill with water until it runs out from behind the interior trim panels and into the car…Open the doors, get on your back and look up at the bottom edge for the drain holes…Make sure they are clear…Next, remove the back seat…See what you discover under there…