What is this?

[Vincent Brick]

I found this floating around in my engine bay near the ABS unit, can anyone point me to its home?

Thanks

[VoltageDrop]

Ha, I played the same guessing game when I first got my E30. That's a rubber isolator that goes on the bottom of the airbox. It probably fell out last time the airbox was removed.

[Vincent Brick]

Sweet, thanks!