The car makes an awful roaring noise sometimes at 35 and almost always at 52mph. Honda knows about the problem. It is related to the active noise canceling system (ANC). I have brought it to the dealership 6 times, minimal success. The way to stop the noise is to crack open window (but that's not a fix) or accelerate through it. Honda also disconnected the ANC but that shut off blue tooth microphone. Honda calls it a characteristic of the car. I would never have spent 35k+ for this noise maker had I known.