This may be a stale subject, but I didn't find anything after scanning over the lists on this site. The black plastic piece on the bottom of the car behind the air dam keeps coming loose whenever I have the car at any real speed. This morning it blew/sucked loose at about 90 mph. This is not the first time it has come loose, luckily the first time the dealer replaced it free. I caught it before any real damage was done to it this time. Can I live without this piece, if not is there a fix or replacement part that will stay in placec?