The A-pillar tan plastic trim panel rattle is caused by "free play" of the tabs where they insert in slots of the black dashboard. The rattle happens at low to moderate speeds on somewhat rough roads. Place your hand on the tan plastic trim panel (near speaker or below) and the rattle stops. So, I watched a few videos on Youtube of how to remove the trim panels (Accord, Civic, Pilot all similar / minor differences). I removed both from my car, added black gorilla tape over the tabs, and some rolled up bubble wrap (insulating foam would work too) taped in place from the tabs area to the bottom of the little speakers, and then reinstalled the panels. Rattle has stopped completely! To get an idea of what the panels look like on their back side, search on eBay for Honda Clarity A pillar trim panel. Seller posted photos of all sides allow you to see the tabs, mounting plastic pins, etc. Looking at these photos combined with the YouTube videos, made it an easy fix. Warning! If you are not mechanically inclined, don't do this--take it to the dealer. I didn't want to take time to go to the dealer, wait, pick it up later, etc., so I just fixed it myself in about an hour in my garage. I'm sorry I didn't take pictures or make a video while doing it, but its similar to other Honda A-pillars (YouTube videos).