The Real Reason Cars Have Shark Fin Antennas (Most Drivers Don’t Know This) August 11, 2026 by omar ADVERTISEMENT base. A cracked housing can allow water to enter and corrode electrical connections. A loose antenna may also create wind noise or allow moisture to collect beneath the roof lining. Owners should pay attention to changes that appear after an impact or roof repair. Problems affecting several communication features at once may point toward a shared antenna continue reading … ADVERTISEMENT ←PreviousNext→