

Mazda CX9 Folding Mirrors stuck after carwash
Just documenting this here in case it helps someone else in my scenario.
After hand-washing my 2017 CX9, the mirrors stopped automatically folding shortly after.
Looks like this is a common issue online and many people have documented the WD-40 fix.
I noticed that when I "assist" the mirrors when locking/unlocking the car, they would seem to open and close with full motion under the power of the electric motors, so I knew it was a jamming issue.
My first attempt didn't work (I only sprayed into the larger hole on the left, the one accessible without taking the mirror off).
Then I tried applying WD-40 in both of these holes (removing the rubber grommet off the 2nd one) and the issue resolved instantly. I had to remove the face of the mirror to access them both - be very careful when doing this to ensure you don't snap the mirror.
Adding this as another data point in case it helps someone in the future!