I don't know. I have a 2013 Hyundai Elantra and theres a round powder spot that keeps appearing on the passenger seat. I've cleaned it several times, brought it to the dealer. The dealer cleaned it. It looks like it's resolved, but in a month or so, it comes back! It's round, about the size of the bottom of a coffee cup. It's come up about 6-8 times over the last 1.5years. Very puzzling.