I am not familiar with that car and model, but it probably has an electric fan for the radiator. Could be a problem with the fan starting.
07 Acura TL has an intermittent loud low end buzz after idling for 15 minutes. Switched car off and didn't hear it again for 24 hours. A slight puff of smoke emerges from area of fan with a light burn smell. Ideas?
Fan motor smoking burning up or belts any ck engine lite on?