What type of exterior source would cause damage like that in a perfectly straight line at the same time my engine is overheating? Like I mentioned earlier, as soon as it overheated, I pulled over, got out, and saw the damage. It all happened in about 3-4 minutes. That damage was not there prior to leaving the house. I walk out facing my car and would have seen it. Funny, because the tow truck driver said he saw this same type of damage from a wire that overheated that runs behind the bumper. And I know the dealership didn't take it off to look. This is the second KIA that I have had issues with. My wife has a Stinger that the dealership had for a month trying to find out why the engine was leaking. They had the wrong plugs in the back of the engine. It has been a nightmare.This really looks like exterior damage. There is nothing behind that part of the bumper. Some picture from the backside of bumper would indicate if the damage is external. But that's a lot of work to take off the bumper.