I've been following the Squeaks and rattles solutions
thread and it seems others are noticing the front door rattling around the door handle at higher volumes with the upgraded Bose system. This rattling has been bothering me since day one because I usually listen to my music at around 30 volume with treble set to 5 and bass set to 4/5 depending on the genre. I recently went on a quest to quell this noise, and I believe I have been able to get rid of most
of it. Mods, if you believe this post belongs in the aforementioned thread, I'd be happy to move it. I just figured this DIY was specific enough to deserve its own thread.
First, I want to mention that this DIY involves three separate fixes at the same location. I don't know which of the three are actually working, but I'm documenting everything I did anyway since overall they've worked for me.
You'll need the following materials: a Phillips screwdriver, two rubber grommets (one for each door), and some soft cloth you can cut/tear apart (not pictured; the more spongy, the better). I don't quite remember the size of the grommet I used, but I always have an assortment of them handy since they're fairly inexpensive on Amazon and you never know when you'll need one.
Open the door and pull the door handle back to reveal the hole for the backplate. This hole is large enough to stick a finger in to pull it out. Gently pull it back towards you and somewhat towards the front of the car. IIRC, it's being held by five tabs, three around the center and two at both ends.
Removing the backplate will reveal a screw and what looks like a hook that does... something? Not sure what that's there for. Anyway, remove the screw and use the rubber grommet as a washer for it. Then roll up a small piece of cloth and slide it into the hook. The hook is loose enough to gently pull back for this, which is why I thought it could be the source of some rattles.
Finally, cut/tear some cloth to fit behind the backplate before reinserting it. Note how I've kept it clear from all the central tabs. This part took me a while to get right. I had to find a good thickness since when I reinserted the backplate it sometimes felt a bit loosely or tightly packed. You want a tight packing but not enough for the cloth to pop the tabs out.
Now crank the bass up to 6 for science and test your music. I've noticed the rattling reduced significantly, but was not entirely eliminated. Some rattling still comes through at 30-35 volume with bass set to 6. The fix did well enough for me to not notice rattling while driving with my normal settings though, which is most important. Hope this helps others out there!