Mine does have some slight rattling from the hatch area still. After leaving my car at the dealership for four days, they reported that it was the shims (the long, straight bars on either side of the hatch that help it open and hold it up) that were rattling, and that there was no good way to fix the problem short of removing the shims. They told me that Toyota had documented the problem, that Toyota would probably produce a new set of shims for the tC, and that they would let me know when a TSB had been released.