I've owned my 16 RDX for about 5 months, and I've been plagued with an annoying rattle or clunking sound. It sounded like it was coming from behind the glove compartment. I would hear it only during alternating right and left turns.

Well this morning I finally found it: I use the sunglass storage compartment in the overhead console for spare business cards. Once I removed the business cards the sound went away.

I thought I would post this here in the hopes of saving someone else some trouble.