The bottom window trim on my 2006 Mazda 3 appears to be falling off. I don't know if this is common but my only guess is it's due to cold temps and possible window scrapper strikes. Here is what it looks like.

Anyway, my question is has anyone replaced this and if so what was the cost? I believe I found the part in question. 50-640 or 50-640Z

Although it's not cheap at about 40 per door it's not terrible either. My real concern is the labor to actually replace the darn thing and if it's even worth it.