iSimple Dual Auxiliary Input Interface for Ford/Lincoln/Mercury - ISFD531 Vehicle MUST be either equipped with, or have the ability to support Satellite Radio Non-navigation radios must have an "AUX, "Sirius" or "SAT" button to be compatible 2009 Ford/Lincoln/Mercury vehicles equipped with navigation are not compatible In 2009 Ford changed the radios in the following vehicles halfway through the year from having an external satellite radio tuner to having an internal satellite radio tuner. These vehicles will not be able to support the ISFD531 if they have an internal satellite tuner: Ford Focus, Ford Escape, Mercury Mariner