There was a thread on AFF last month on this subject, it end up being removed as the thread starter asked for it to be taken off. They say the BA is safe. He said his mate is a Ford Master tech that has just done a training course, Ford now have a scanner called "ORACLE" that can be used on any suspect warranty claim to retreive any piece of information the pcm has stored since the vehicle has been manufactured, it can tell if the vehicle has been fitted with a tuner, what maximum boost level has been reached, what maximum rpm was reached etc etc: