An accessory mounting system for a vehicle includes a bracket attached at a windshield of the vehicle. The accessory mounting system includes control circuitry housed in a housing, and the control circuitry is associated with an electronic device housed in the housing. The electronic device is selected from the group consisting of a microphone, a camera, an antenna, a loudspeaker, a rain sensor and an automatic toll booth transducer. The control circuitry is in communication with a vehicle bus system of the equipped vehicle. The bracket may include first structure and the housing may include second structure. The first structure and the second structure may be configured to enable the housing (i) to be attached to the bracket with the bracket attached at the vehicle windshield and (ii) to be detached from the bracket with the bracket attached at the vehicle windshield.