Two days after we purchased our EX we set out on a 3,000 mile trip. During the trip my wife and I noticed at highway speeds the hood kind of bouncing up and down like it was unlatched. This happened mostly when we were passed by a semi on a 2-lane highway. The wind of the semi seemed to be the only case where we noticed it. We stopped two times and checked the latching to make sure it was secure. It was. And then we would open the hood and check the back hinges to see if they were secure. They were. It is strange but now understanding that "the hood is made out of aluminum to reduce the weight but was also designed to collapse inward if a pedestrian is struck by the car to reduce injury" makes sense. It's something we can get used to and should be no problem. Saving money on gas with lighter weight (and presumably safe) materials as well as saving lives with a collapsable hood is very important to me. I can't imagine Honda engineers designing something that is dangerous for the passengers.
I haven't experienced it yet... but wondered if the sound/vibration is directional? Like left/right, front/back, or all random directions?We got 40-50 mph wind gusts today, and while driving to and from work I noticed the hood would "flutter" and vibrate during strong gusts, similar to how others have mentioned in prior comments when being passed by semi's at highway speeds. If this is a common occurrence amongst 2019 Insight owners, I can't imaging Honda isn't aware of it given they must have experienced it during their wind tunnel / aerodynamic testing. I guess as long as the hood does't become unlatched during these events, there shouldn't be anything to worry about.
If hood vibration reappears even with the dampening, there are a few adjustments that can be checked:Actually on the way Home I was more afraid of the vibrating Aluminum Hood flying off of the Car. I settled that down some by adding Vibration Dampening that you usually use on your Doors for Speaker installs. Supposedly they make the Hood so flimsy so it will fold up if you were to hit a pedestrian. I'm sure its also to keep the Car light for Gas ratings too.