Windshield antennas are integrated into the windshield, installed between the inner and outer layers of glass, and require windshield replacement if damaged. The rear window antenna consists of a grid baked onto the glass surface, similar to the rear window defroster heater grid, and can often be repaired like the heater grid if damaged. For models equipped with cellular navigation or digital satellite radio systems, the roof-mounted antenna necessitates the removal of the headliner and, in vehicles with side-curtain airbags, the side-curtain airbag modules for replacement, making it advisable to seek assistance from a dealer service department or qualified repair shop for this type of antenna.