I might as well dip my toes into this epically long thread. I have an 07 335i, I have owned it 3 years, but just began the process of going FBO with a tune.
I too have all the symptoms on HPFP failure and Injection failure. I'm still on index 1!
I have an airbag and blower motor recall. Not much use there. My last two options are as follows:
1. Send a strongly worded email to BMW
2. Pay out of pocket for parts.
We all know option 2 is my only real option. Thank God for FCP Euro and their warranty.
I'll let you know if my email bears any fruit!