I have a 2012 4 Door Sahara. It was finally warm out today so I decided to take off the hardtop and doors. I then proceeded to take off the door surrounds. I then left the car alone. 2 hours later, when I got back to the car, I found this piece sitting on my drivers seat. I just can't seem to figure out which hole it belongs in. Anyone have an idea, it's driving me mad. (Bottle cap is for scale)

 

Looks like the rubber bumper for the top latch

 

That or those two rubber stoppers on top of the center pillar right under the tip of the hardtop...

 

I'm confused. You took off your hard top and then took off your door surrounds?

 

Looks like the rubber piece that the glove box rests against when it's closed.

 

Or from the lid of the center console.

 

Have to agree that it looks like from the pics and the size compared to the cap that it is the bumper above the sound bar for the rear hard top to rest. There should be two matching bumpers (one on each side, driver/passenger).

 

That's the one it looks like to me too.