Not sure if this helps, but my 4/4 had a knocking noise which sounded like it was coming from the rear. In the end it was these 2 bolts next to the door hinges on the passenger side that wasn’t fully tightened.
I think it’s called the scuttle roll bar ?
![[Linked Image]](https://www.tm-img.com/images/2021/03/21/85A2D2AF-793C-4563-AE30-9DC043C0BF7F.jpg)