my karma under the dashboard I can hear a metal crash sounds (very small sound) and plastic shake sound under windshield is been for few months already i think it's small problems so i don't worried, but today I can hear like small bumping sound come from under the windshield or dashboard when car driving on the road is not smooth. if the road is flat and smooth no sounds. only thing I can think what happens is few day's ago I drive on highway about 65mph and hit a small paper box and I checked the car front bumper and under the car no any damage . No CEL