The sideskirt cladding has a vent that allows water to pass through, when doing a lot of driving this vent will eventually get clogged with debris, when water attempting to pass through the skirt and out of the back of it has nowhere else to travel, it somehow finds it's way onto the floor behind the driver & passenger seats. The airbag sensors are located near this location and will get shorted out. This causes a really annoying fault light to pop up every time you start your car. It's terrible.