Yeah, so because of this issue, I don't really see a point in dropping $3000 bucks on an extended warranty. It's better to take your chances on this one. Turbos are really the only high cost of the car anyways.
The second most expensive item are probably the injectors but those are $120-150 a piece on Tisher. Like I said, it's not likely all six injectors would fail at the same time. And injectors seem to hold up quite well up to 100K miles without issues. The early build injectors had major issues.
HPFP issues also seem to be history.
2009 335i 6MT - M-Sport - All stock