That just doesn't sound right. If the fuel pump failed they should have been able to tell immediately by reading fuel pressure which should be a part of normal diagnostic procedure. Also if it failed previously how is it back to good order now? The metal shavings shouldn't be making it through the fuel filter so they couldn't have clogged the injectors. Sounds to me like something wasn't connected or was plugged in incorrectly and they "fixed it" during reassembly. I'd still be asking questions. I don't know anything about your shop and they may be great, I am just very skeptical, especially because so many bmw "mechanics" rely solely on what the car's computer tells them without ever actually performing normal diagnostic. Either way, I hope that's the end of your troubles and you get to enjoy your X.

Just thought about something else. I belive the N62 has dual vanos, if so are they easy to swap connectors on? That will wreak all sorts of havoc. Similar to accidentally swapping the left vanos and vent solenoid connector on an M62.

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Again Daily Driven SC'd 4.6iS, whats the point of having a sweet ride if you dont use it all the time.