Sorry to read for your troubles.That goes much beyound the normal headache expected from the new models BMW.It becomes more and more obvious that the accountants and other forms of people that care of the profit only have took over BMW.Mercedes once did that mistake in late 90s.It cost them a lot,but were able to get out of the downward spiral.Their board of directors appointed in '02 or '03 that for a few years they will spend half of their net profit for improving the quality only and only.After th eterrible models of early 2000s the improvement showed in models after '05 or so.One of the problems is that with manufacturers of that caliber it takes a few years of quality problems before the sales start to plummet,but by that time a bad name could be established.If this kind of problems are not identified on time recovery may take a very long time or may never happen.
I just came back from Texas where we were testing a new ECU flash for the X5D and 335D and guess what happened?! A seventh EGR cooler blew on the test car taking out the thermostat housing and the MAF in the process

A very long and expensive operation was completely ruined by the dealer not willing to cover some/all of the parts.But they are unobtainable for the next week or so anyway