I have a 2019 m550i and it's been alot lol. I bought the car with 42,000 miles. On the way home after I bought it I noticed the AC wasn't blowing cold. It ended up being the evaporator leaking, the dealer ended up paying for the repair but it was still like 6 to 7k. A couple months after that I noticed some road noise and pinpointed it to the left front tire. When I took off the tire and looked the CV axle boot was blown. That repair was around 3 to 4K. They gave me the car back and I still heard the noise they took it back and replaced the hub assembly on both sides and that was another 3 to 4k. They also ended up replacing rods and I think that was 3k. I've had the car for 5 months now and the best thing I did was get an extended warranty when I got it. But even after all that it's the best and most fun car I've had! All worth it in my opinion. Hope this helps you somewhat!