BMW stands for "Blew my wad"
Big Money Waste
Benefits Mechanic's (or Machinist's) Wallet
In the late 90's when I was a machinist, the shop I worked at had a lot of dealership accounts. We were getting 3 to 5 6 cyl BMW heads in a week for blown head gaskets. I don't remember which series they were. That was just one series. I saw lots of cracked BMW cylinder heads, blown gaskets, etc throughout my 10 years there.
A week and a half ago I went back to my old shop to get some stuff bead blasted and they had a 2008 BMW head in the shop that had lost it's timing belt and bent all the valves. A 2008 car with the head off already! That's ridiculous.
They are all junk IMO.