There can be water on the back of the rear passenger in Duster. She gets there through the door, through the plating, through her internal cavity. The removal of the plating (for example, the installation of an audio system or an alarm) was most likely to be damaged by a leak between the metal door and its plating.
There are several ways to solve this problem. The simplest is to remove the rubber valves at the bottom of the door. It is also possible to miss the sealing of the door and the sheathing by removing the shell or removing it. If the water flows from the speaker's niche, it is necessary to remove the speaker grid and seal the hole in the niche.