Im just in this cause i have years of work experience with tires and rims, only reason for a relearn on the sensors is if there was a new one installed. Newer vehicles relearn the sensor position with approx 10 miles of driving. Chrysler has the easiest an most cooperative sensors though. But working at a dealer id do rotates and new tires on new fords,(was a Chrysler dealer, but had a ford for the same dealer group not too far away) and never once had to re learn sensors unless it was a brand new sensor. Never did a mustang though. A lot of 2014 and 15 vehicles though. Im not trying to argue just talking from what ive ran into.