I have a 2014 CX-5 with about 100,200 miles on it. It sounds like there is a metal ball rolling around in a metal cavity in my car. I’ve taken the entire interior apart. It sounds like it’s coming from where the front bolts for the passenger seat rails go but that’s all welded together. It started a few months ago and there wasn’t an accident or anything like that. Whatever it is, it moves around freely with acceleration, hard breaking, hard turns, and uneven pavement/hills. Any ideas?