My old OEM mirrors were bought used and wouldn't budge on the adjustment. I finally had to heat them up after trying soaking them for days with PB Blaster failed. Heating them up got them to move but the just flopped loosely once they moved, so I had to tape them into the right position, then glue them into place, so now they won't adjust, but at least are set for me, the only driver

I used a small amount of Gorilla Glue so it doesn't look too bad, but I'd still like to buy a set of these, and probably will, to have a functioning set.