What i noticed when i was under my car was that there was a small hole cover by a masking tape, i simply put three more pieces of tape over that for more protection. This hole was 7 inches from the front tire , driver's side. Couldn't find the hole on the passenger side. I think this could be it since i also had water in my spare tire compartment .. about a good 2-3 inches worth of water . Went under neath the back and also found two same size holes covered with cheap permeable tape , and put more tape there , and no more water anywhere ever since!