Front Air Bag Sensor Control problems of the 2005 Ford Focus

I own a 2005 Focus zx4 whom has been serviced several times for engine mounts, alternator, headlights/tail lights, stereo, and now passenger front seat airbag sensor. I was told back in 2009 that the passenger front seat airbag sensor was not covered by the extended warranty but the stereo was!!! so everytime I have an adult in the passenger front seat the airbag sensor in the seat malfunctions; a safety feature to keep your family safe is not covered and now I see another car manufacturer recalling the same thing but Ford is not willing to fix. I called Ford headquarters and no help or care to do so. . . This will be my last Ford I purchase after years of growing up with Fords. You would think they would care about their consumers.