Hey guys, so I just got a 2018 Honda Civic EX-L last June 19th. I've noticed a rattle in the dashboard....specifically hearing it from the middle AC vents. It happens around 1500-2000 rpm. Does anyone know what the cause is? I've been at the dealership 4 times now and I'm really getting tired of going there. The last time I took it to the dealer, they took a week to try to fix it and replaced the heating system but it still has the rattle so i'm really losing hope with Honda now. Please help! I will post a video of what it sounds like.