This is just an opinion based on having 6-7 bmw's over the last 15 years, but imo BMW quality has gone down hill. Making it worse, they are increasingly utilizing proprietary software that makes ownership for do it yourselfers more and more difficult. They are becoming a "lease it and walk away" brand to me.

Specifically, the e70 I've owned has been one of the worst in terms of stupid issues and quality problems. In reality, as a faithful BMW supporter for years, I may be coming to the end of my relationship with the brand.

Case in point, as one example, the e70 I have had catastrophic engine seal leaks at 55k miles, 5k after warranty, and 2 months or so. Suddenly Leaving puddles of oil everywhere. After 15 years of ownership, bmw na and the dealships position was " that's normal on the x5". As bizzare as the problem was, the response was worse in my opinion.

Among my family, we have a small fleet of x5's and x3's, so I get lots of data points. Examples, the pano roof on every one has failed. We've all had coolant overflow tanks crack. Door handle issues, radio and electronic gremlins, the list is way too long, and we all end up with the same problems. Imo, that's a clear sign of bad design and/or quality when the same problems are happening over and over. And many of these are components that have been around since cars were first made! I mean, multiple door handle failures? Hood failures with no safety release designed? Come on....

I hope you have great luck with yours and it lasts years to come. But unfortunately, my answer would have been its not worth keeping, problems are too likely on the horizon.