My beemer is leaking cooling fluid. Found out that it came from the engine block a bit muffled away inside (so,, at the front, but there is a little piece to the bottom and on the back of that, left side.. can't describe it better).
Mechanic put in some kind of stuff that (hopefully) solves it.
Put in a different fuel pump earlier and it looks like that was the cause of the engine failing on me from time to time.