I really don't know how to word this, but the dealer service guy I was talking to didn't know. On the front bumper of the Rio under the passenger headlight is a like a little square access door that snaps on and off. What is this for? I don't see anything directly behind it, and it's a pain to wax around when I wax the car. I didn't really think about it too much until I was waiting for a oil change at the service center. Was checking a car that was hit in the right side and that piece was missing off the front bumper.