I'm at wits end trying to uncover the source of a vibration and noise. The noise is a deep base vibration that occurs as the revs are coming down while in neutral or when I'm in gear decelerating towards the lower end of the RPM. If I rev the car in neutral I can feel a vibration in the door...
My dealer replaced the headliner on my 19 R after I found a plastic nickle sized speaker like cover on the rear seat delete area. As stated in another post, I assumed the round hole in my headliner was maybe part of the noise enhancement / cancelation feature. The dealer replaced the headliner...
After driving home my 2019 R on its first ride, I found a button size plastic cover that has small speaker like holes on the back floor. I tried to reinsert it into the rear of the headliner but there was nothing for it to grab onto. Seems like what's between the headliner and the inner roof is...