I have a 2020 platinum max and only 300 miles on it
Since I bought it there is a noticeable whistle from the drivers outside mirror
Sounds like a tea kettle
Dealer said it is a characteristic of the suv
Im not accepting the answer but just wanted to know if anyone else has this issue
This is my 5th Expedition and never had this on any of them

 

I know it’s been a long time since you posted this but did you ever get a resolution? We have a brand new 2021 platinum max that does the EXACT same thing. Thanks!

 

Yes
I had the mirror replaced but has started again
Im going back to dealer next week for service and will discuss with them once again

 

Remember when you could blow over the top of a bottle and create a particular sound?

Wind blowing over the mirror area could be very likely doing the same thing.
What can change that is simply changing the shape of a part or area where the wind is playing a tune.
If you can, until someone comes up with a definite answer, maybe tape a small piece of cardboard on the back end of the mirror to alter it's shape might produce an answer.
That is , if ,the mirror is the actual origin of the whistle.