From auto appraiser Jason Phillips- Now here’s a repair that will not only set you back $2500, but will mildew your carpets and rot out your floor pans as well if you’re not careful. It’s not an easy fix, primarily due to location. It’s hard to see, because you cannot remove the cowl screen and look inside. The best way for a quick check is to dump in a cup of water, through the cowl screen, and go look inside at the kick panels. If water begins running down, onto the floor, then, by golly you’ve got it!!