Strange "screeching" sound similar to a cat with a smashed tail coming from somewhere within the car. Not from the audio system. Sounds like a mechanical issue...like a bad fan motor? Coming from the back seat area, I think. However, car doesn't have rear AC. Base level trim. Very sporadic, happens 2-3 times an hour while the car is moving. Happens with or without the seat ventilators turned on. Haven't taken it to the dealer yet.