I am wondering if it is common. Seemed to start after the first couple weeks.
It is on the passenger side. Sounds like a dull plastic rattle, or "ticking", perhaps coming from the door or
seat belt area. Pretty consistent over small bumps and rougher pavement. It is not simply the seat belt rattling.
I haven't investigated carefully, but it seemed that when a passenger was buckled in, I didn't notice it.
Familiar to anyone?

 

I get a faint high pitched rattling/squeaking from the passenger side too. sounds like it's behind the HVAC buttons on the passenger side behind the dash. It's infrequent and pretty inaudible under most conditions so I don't bother taking it to get looked at or tearing the car down to find it.

 

We had a very warm afternoon here, and that seems to have eliminated the rattle for today.
Seems like a cold weather noise, like I was familiar with in my Infinitis.
Things shrink and get looser......

 

I get a tiny rattle/ticking noise in my driver door OR vents. I can't really pin point the exact spot. Happens to notice it during drives on bad road, but often gets drowned by music.

Doesn't really bother me much.. had the car for over 2 years now.

 

There is a B pillar fix walk thru if you search.