Like GM vehicles which are equipped with OnStar, this Lexus sports the same small and somewhat classy-looking antennae where the roof's sheetmetal meets the top of the backlight. The unit accesses OnStar, which Toyota/Lexus makes available to their vehicle's buyers, and it also double-duties as the car's satellite radio antennae (in this case, it's XM Radio for Toyota/Lexus ... and GM).