A NEW investigation was opened by NHTSB because of the number of failures on taurus coil springs. It is not just taurus, either. Do the research and you find focus, contour, windstar front coil springs breaking. It is SO common, apparently, that the front coil springs are not even covered by extended warranties. There was a post here in april about it and soemone told the poster they "had not heard of the problem"....it is a TERRIBLE problem with ford, especially taurus, windstar and more than a few focus.
If youu buy a used one the dealer will not even TELL you that they have a high failure rate. Supposedly new owners were informed, though no recall was issued.