Had this annoying rattle from the passenger door since recent purchase. Noticed the passenger side door handle very loose (connection of handle to vehicle). Removed inside door panel to find both a very loose bolt (left bolt holding handle) that I added some locktite and also this odd piece of plastic that was unglued and banging around. Was able to re- glue and now it’s all good. Fyi if you have a door rattle. Might be this plastic unglued.
