I was a BMW mechanic from 2009-2012. I can’t believe anyone buys them after what I’ve seen. The engines are all made of plastic and start to literally crumble to pieces and leak oil from absolutely everywhere after ~70k miles. We had to have customers sign disclosures on these cars because inevitably they would just crumble to pieces when we went in to replace one part and we’d end up having to replace others to reassemble it. Or we would pressure-test the cooling system to find a leak and end up creating several more.
On their V8s there’s a plastic cooling tube that runs from front to back on the engine. The tube itself is like $10 but you had to disassemble the entire engine to access it so it would cost several thousand $ in labor.
We eventually started selling an aftermarket CNC aluminum one that was threaded and expanded into the hole. We would just beat the old one out with a hammer and thread the new one in in a couple hours and they’d never have that problem again. Why BMW couldn’t think of that is beyond me. The people who did made buckets of money selling aluminum tubes for hundreds of dollars just because they could.
You might expect cost cutting like that from a Kia or something but not from a car that’s advertised as a premium brand and sold at premium prices.