2021 legacy rattling

[Jv123]

Hello, I just purchased a 2021 legacy and I’ve been noticing a rattling noise. It seems to be getting louder and only occurs when driving under 15mph. I recorded it in the video below. The dealership couldn’t find the issue

 

[lawentz24]

That's the same sort of noise that I have on my 2018 Crosstrek, at low acceleration. It makes more of a metallic sound and as soon as I leave off the gas it stops.