I have a 2000 Toyota Solara two-door, and there is a piece of clear plastic covering the corner of the "door frame" at the lower rear corner. It's L-shaped with a rounded corner, like the door, about 3/4" wide and 4" horizontal from the corner, 4" vertical from the corner,
It also goes into the space between the door and the "frame" about 3/4", and it's on both door frames. The material is no more than an eighth of an inch thick.
Is it there to protect the door frame? from my long keyring My pocketwatch. From people climbing into the back seat? I don't think any of these things woudl hit it.
It's gotten dirty and I'd like to take it off, but if I do, this will be the last time I remember to ask about it