Leased new ST. Heard noise immediately. Made appt, dealer couldn't diagnose even after test ride with service tech. Took service Manager out for a test ride and he heard it, no idea what it could be. Was going to wait to see if anything comes up. Weeks later I spoke to them again and they were going to order parts. Some parts back ordered. Parts show up and are put in, noise still there. Again no information from FoMoCo so it's we will wait. Another discussion and I'm dripping vehicle of and dealer is going to wait. Very frustrating. Love the car, but hate the noise. Will keep you posted if is ever fixed.