You would have to drive through a puddle 3 feet deep. My last audi had a tube like that from the factory that faced forward. There were no drain holes and I never had problems. Been driving for a week now and no problems. I just popped the Rad. cover off and grill cover. Wedged my arm in there with a razor blade and cut the very front off. I am convinced alot more air now gets into my Volant Box.