A couple months ago, I started noticing a rattling noise coming from my car. It was coming from somewhere to the right of me, but had trouble pinpointing the location. Every time I would drive on bumpy roads or over speed bumps, the rattling would happen. Scheduled a service at my dealership so that they could look into it. That was scheduled for today. Then, yesterday, I figured it out. It was my sunglasses, rattling inside the sunglasses holder at the top of the car. Thankfully, didn't have to pay the service department anything to find this out for me
When I first got my Niro 2020 I had the same issue. The noise was driving me nuts. It always sounded like it was coming from the glove box but of course it wasn't.
My Niro 2020 rattle was loose buttons on the garage door remote. Took me a few weeks to figure that one out.