Although the Toyota manual apparently provides that the dealer install the Sirius antenna on the trunk, I e-mailed Toyota directly and they told me the antenna should be mounted "underneath the front windshield". Is anyone familiar with such a mounting location? I researched antennas and see that Sirius makes an antenna called the SIGMA which mounts on the windshield above the rear view mirror. Anybody familiar with this antenna and does anyone know if this is the antenna Toyota now uses for Sirius? Many thanks.