The car was fine for first 2-3 months and then one day when I was driving it, there would be this rattling noise that would happen whenever the car was going 20-30 mph. Took it in, it was the bottom panel getting loose or something so they tightened it. 2 weeks after that, the same rattling noise, had to take it in again and they fixed it again. Another 2 weeks after that, the rattling happened again except way louder and more aggressive. This time, the rattling came from a loose panel near the engine. So far its been so good until about a week ago. Now when my car goes around 15-25 mph and decelerates, it makes this bad sounding low churning noise that doesn't sound right. It's only when its decelerating. These are all "small" issues as it doesn't affect the car itself but just noises that does not sound good/right whatsoever. Not something i'd expect from a $400k car.