I recently had a problem with my wheel/tire. I really only knew about it because I found that my tire had a nail in it and PSI had been low off and on for weeks. I took it to a tire shop for a simple patch and three weeks later I was still losing tire pressure, about 5-10 PSI overnight. When I took it back to the tire place (thinking perhaps the patch was not holding), they noticed that there was corrosion at the bead seat area, but they did not tell me before deciding to take a wire brush to the wheel and seal it. I then proceeded to take it to Ford, since my car is barely a year old, who informed me that the tire place had voided the warranty on the wheel. The man at the tire place did not believe me when I told them that they were factory wheels and just told me "well I don't want to argue with you honey, but those are not factory wheels." Just because I'm a girl does not mean that I cannot understand or do not care what work you are doing to my car, nor does it mean that I do not know what comes factory on my car that I did months of research on before deciding to purchase. Anyways, I don't know if they really did void the warranty but I was able to get the tire place to replace my wheel with a new one, free of charge, as they did unauthroized work. In a previous post someone attached the TSB for this problem. Based on what I saw there, Ford is to determine whether there is corrosion at the bead seat area and then are supposed to supply you with a new wheel. Let me know what happens if you take it back with the TSB, as I am pretty sure my other wheels will one day have the same problem. I would suggest bringing the car in once the tire pressure light has been triggered (as long as the PSI isn't dangerously low, obviously), as that is the first step to the TSB. Hopefully Ford will honor this TSB and not try to do a quick fix again for you. Good luck and I hope to hear that it worked out.