Abstract: An improved vehicle antenna device that reduces the cost and complexity of the antenna and its installation procedure. An antenna is mounted within the fender of a vehicle, while the antenna amplifier is mounted on the opposite side of a structural wall. The electrical connection between the antenna and its amplifier passes through a vehicle wall through a water-tight bushing. The bushing is made an integral part of the amplifier housing so that attachment of the housing to the vehicle wall causes the bushing to simultaneously penetrate an opening in the wall and seal that opening. The antenna is then plugged into an electrical connector in the bushing which is already in electrical contact with the amplifier, thus completing the installation. The water-tight seal can be improved by coating the bushing with an elastic material, by giving the bushing a slight tapered shape, or both.