I've searched and tried to read these forums and found very little related to what I am regularly hearing in my new MX. Vin ends in 11908 delivered early this month. Only have this a week or so so its all new to me. But my wife and I both clearly hear whine that begins just above 40 mph and pretty much gone over 50. Around where we live there is a lot of 45mph speed limits and so we are in that zone frequently. I'm developing a list of things to go over with the tech people either local or by phone. I've got several. But this is the only one where I have great concern in adding miles while this is figured out. The car is running totally in factory default modes, I've not adjusted anything on range for example. Anyone have thoughts on this or heard the problem? I've got some experience with motors and drives outside the automotive area, and this kind of sound is typical of what I've hear related to the power chopping and speed control.