NF (2006-2010) Sonata
I just got through this problem--or, at least, a related issue.
About a year ago, I had that ka-chunk/rattle sound whenever I went over a bump, and I had my struts (REF 54-546) and torsion bar (54810) replaced by Shop B. That fixed the problem.
Last month, I got a ka-chunk/rattle from the...