Guys, after been a week of 2019 X3m40i ownership. I really like the aggressive exhaust sound until it starts the vibration/rattle sound at the first 30 secs of cold start. Plz check the Youtube video below. Seems I'm not along in this forum facing this problem.
I believe the exhaust tip does that, cuz when I use my hand to hold the bottom of the tip, and the noise just gone. But will bring it in service tomorrow anyway, I will update here once dealer gives me a solution.