NHTSA Complaint #11483522 — 2019 FORD F-150

I've been dealing with a vibration/shaking in my factory driver side mirror at high speeds and on bumpy roads since I got my truck in May 2019 (over three years). No issue on the passenger side. I've dealt with it off and on with the dealer as time and life have allowed. Currently I'm on my fourth mirror and have a case manager from Ford corporate. I have attached some of my correspondence with them for your reference. My problem is that the driver side shaking is very bad. It's distracting at high speeds and at night when headlights are shining behind you, it can be like a light show in the corner of your eye while driving. After much trial and error, I believe the vibration is coming from the articulation point between where the arm that comes off the truck connects with the arm that supports the mirror. Where it folds in basically. There isn't anything that can be adjusted, that particular area is all enclosed. I'm on my second dealer after the first claimed the mirror was fine. I took the truck for a drive with the foreman at the new dealer who confirmed he could see the issue. They ordered me a new mirror again and after installing it sure enough the new one shakes just like the prior ones have. The dealer said they had a regional service tech from Ford drive it after the new mirror went on and this person told them the shaking was normal. I'm talking with the case manager from Ford also and they are investigating what to do since there's clearly (in my opinion) some sort of defect with this part but no recall or fix has been made to my knowledge. I may be elevated to their legal team. At issue currently, I have asked my case manager from Ford whether they can have someone such as an engineer or safety team examine the part and assess whether the mirror design is faulty but they have no one in their company. The case Manager claims to not know if Ford has a team like this. The dealerships didn't design the part so they can't assess whether it's flawed.