Genuine OEM Volkswagen Roof Shark Fin Antenna Base, part number 1K0035501F. This component is mounted on the vehicle's roof and serves as the primary connection point for various communication and entertainment signals, including radio, GPS, and cellular. It integrates multiple antenna elements within its aerodynamic shark fin design. Weighing 0.273 kg, this base ensures optimal signal reception and weather resistance. Using a genuine OEM antenna base guarantees proper signal amplification, correct impedance matching, and a watertight seal to prevent leaks and maintain factory aesthetics.