i found this IN my s2000's doors the other day, while installing cs mirrors.
it wasn't secured on any part of the door, it was just rolling around
at the bottom of door panels.

what do you think it is?

 

Maybe a filter or something?

 

The closest thing I can tell from the pics is that they might be the glass stabilizer that it mounted near the top of the door opening where the glass comes through the door panel. Take the panel off and look on it and the door and see if you have something missing. The piece(s) should fit along the door molding at the top and towards the rear portion, kinda hard to explain but just look at the door molding part once the panel if off and see if there is anything missing along the top edge near the back. Nothing else out of any of the door components looks like that so if that isn't what it is than I have no clue.

 

Maybe the guy at the assembley plant dropped his Razor in you're door when he was shaving at work?

 

Thank you Seung....

I saw this stupid piece when I was installing my system, and saw it "laying" on the bottom of the inner door. For the life of me I could not figure out what the hell it was. It doesnt rattle, or move, nor could I find where in the world it is attached to. I just left it where it was. Can anyone check the helms or something and find out what the hell this is???

 

Not a clue. Was it same on your other side/door?

Better yet, I would've asked hardtop guy.

If I caught this tread on a weekend, I would've took my door off and checked for you since I didn't/couldn't go to FC2003.

 

Looks like #4 in the diagram. Stabilizer

 

ah... thank you.
so the question is... why would it fall off?

 

Good question, it doesn't look like it's retained very well, maybe some sticky tar stuff or velcro or it's just clipped onto the door moulding, it could be wedged between the inner weather-strip and the door panel. Clip ons and stuck ons can fall off easilly, especially when you pull off what may be holding them on.

 

Thanks for the picture 3ngin33r1, I know it probably just confused him more my me trying to describe it.