I hear a moderate whistle when cruising at 80MPH at part throttle and especially when I lift off the gas at about 80MPH. It's not unbearable but it is just another annoyance that a well behaved car in this price range shouldn't do. Anyone ever hear this?

 

it depends on what you mean by whistle. could it be described as a kind of a humming noise or low drone?

 

could be intake noise! dirty filter?