When my trunk was closing today I noticed that I can see inside my trunk to the space behind the taillight because there is maybe a 1/4 inch gap that is just open, no gasket or anything. I can look inside and see the wiring for the taillights. It seems that water would go right inside. Its hard to capture in a photo but this should give you an idea of what I am talking about (forgive the dirty taillight, it rained yesterday) :