What is this sorcery?

Open your hood and see if there's some area that would go. It might be a molding that goes along the edge inside of the hood

 

I'm surprised they bothered to take something off the car. I was going to suggest a door seal. Do you have "one that doesn't look like the others"?

 

are the rain gutters on both sides of the roof?

 

And what did your car ever do to you to deserve such bad treatment?!?

 

I would also suggest "door seal". Last year, following the three-week "Combination Meter Display" repair (see threads passim) I found a similar piece dangling into my lap when I collected the car. I could see exactly where it was supposed to be located, and so it was a simple matter to fix, without needing the $105/hr skills of a ToyotaExpert, but it warned me to always look out in future! (caveat emptor!)

 

If there's a part number on it, look it up (or post it here.)

 

Agree, it's some kind of seal or moulding. Check along the tops and bottoms of all windows and around the hatch and hood.

 

I have 2 rubber pieces on my roof that look like that. One tends to stick up after the car wash

Posted via the PriusChat mobile app.

 

maybe it was someone else's, and they left it in your car.