Seriously? Imports and domestics all share one common thing: problems. Any car will have them. How come whenever anyone complains about some problem they've got, the first comments are "well, that's what you get for buying import/domestic?"

Cars get old. Parts wear out. You either stay on top of it or let it go and watch it start piling up until you've got REAL problems.

Your bimmer is screwing up because it's been let-go. You have two options: start fixing things, knowing it's going to take a while to get the car back to problem-free status, or sell it.