Hi all,
Not sure if it has been covered here in the past or not so I thought I'd share...
I've been suffering from the dreaded "Trunk Clunk" for months and this weekend, I finally decided to look into it.
Basically, there is a rubber/metal counterweight fitted within the rear hatch to aid opening/closing as well as damping vibrations by frequency matching but 180 degrees out-of-phase. Over some bumps it moves so much it contacts the inner structure of the hatch giving the most annoying and predictable 'clunk'.
I found this guide really helpful an