I was able to fix my rattle (which was more like a cracking sound when it's cold). I noticed the sound stopped if jammed my hand between the place over the cup holder. I inserted a chunk of blue Styrofoam (used to isolate houses) in the spot circled in this pic:
I don't know if it can help. I think every Versa is different, you need to find what causes the sound and work from there. It can take forever and I suspect that with time, the source of the sound might change. I had the dealership try to fix it multiple times to no avail but my DIY fix seems to work for now.
I am not sure if I should show it to the dealership to see if they have a more aesthetic solution to the blue Styrofoam or if I should just let it be since I fixed it and I am afraid they might mess it up..
There are still little sounds here and there (coming from the back it seems) but I've learned to live with it. Versa are prone to all sort of rattles cuz I guess they use mostly plastic for the interior.
Good Luck!