The driver's window weatherstripping is in 3 pieces and the center piece comes loose and falls off. Lost it once and had to order replacement. Passenger side seems to fit tightly. I don't see any retainer or glue to keep it in place. Am I missing something? Any advice welcome.

 

Quick question, did you get this problem resolved. I seem to be having similar issue on Driver side.

 

A tiny dab of black window weatherseal sounds like it wouod be enough to keep it in place. Comes in a toothpaste sized tube. Apply just enough to keep in place, not too much so its too difficult to remove when part needs to be replaced.