I have a 91 Legacy LS, its Gray with Gray interior. I opened my car door today and this BLACK piece of plastic fell to the ground. I dont have any "Black" plastic in my car! Do you think it belongs in my car somewhere? Or do you think someone might be tampering with my car? I have no idea why this would be stuck in my door??

 

What does the other side look like?  Can you give us dimensions or take another picture with it next to something of a known scale.

 

Depending on the size, it's probably the black triangle trim piece on the inside of the car that goes where the mirror attaches to the door.

Yea, I'm gonna go ahead and say that's the trim piece that goes on the interior side of the side-mirror mount.

Yep. The triangle trim that goes on the gusset at the front of the door.

There is NO Black on my car... And I am Not missing any plastic on my car, the plastic in/outside my car is "Gray"

As you can see there are letters ABS on this piece of plastic. Is measures 4 inches by 4 inches by 5 inches give or take.

The ABS on the plastic stands for Acrylonitrile butadiene styrene or a type of plastic. 

 

You might want to just go on a treasure hunt on your car.  If you found it on the drivers side get a flashlight and look up under the dash and on the out of view side panels to see if you can tell where it might of gone. 

It's the black triangular piece just in front of the window.  You can see it in this picture.

 

It's the black triangular piece just in front of the window.  You can see it in this picture.

 

 

 

THANK YOU!!! Thats it!!!

 

Thank you for all the replies everyone, I just wasnt looking in the right place!