Hello, new owner of an 08' Scion TC.
A few things to complain about the car but I still love it lol. The rubber trim on the the side of the panel is coming off. Is it important to keep? Lol I tried super glue but that didn't work.
Any suggestions would help!

 

Same thing happened to mine........I just ripped them off,no difference without them.

 

It's probably there to keep moisture out or possibly cut down on wind noise. Why not check with a Toyota parts center?

 

I just had the same problem with the trim on my driver's side door. I used some clear RTV silicone on the back of the loose trimming and held it down with some blue painters tape until it's dry.

 

At this point I would just order new OEM rubber and replace it. Just make sure to get off all the old glue before installing the new rubber.

 

Do you know what it's called exactly?

 

The "Rubber Trim" in not a Separate Item.

It is part of the Quarter Glass Assembly. Verify with your local dealer. P/N 62710-21210

IMHO, your Best Bet is to as another suggested use Silicone Adhesive Sealant.
Unless you want to replace the entire Quarter Glass Assembly.

Your Choice.