I have a 2013 Santa Fe Sport Awd 2.0T. It has a rattle like a heat shield is loose or Catalytic converter is bad at low idle and cold start up. There is a service bulletin out on this since Nov of 2012. They acknowledge the sound but are telling the dealers not to fix it. I have had it in the shop 5 times for it already. I have had a regional Hyundai Rep come look at it also. They are stating that it is normal to have exhaust rattles on a new car. Never heard of that on any other brand of cars. Anyone else having a problem with this on the Santa Fe and the new Genesis?