This morning I noticed a flashing light under my driver's side dashboard. Bought my 2017 Elantra used and I've never seen this before. Upon looking I found a small black box (about 3in x 2in, about an inch thick) I suppose had fallen or shaken loose, wires running back up into the dash. One side says to face down, the other has flashing red and green lights with the S/N sticker. I can't find any info on what it might be. Anyone have any clues?