This part is listed by BMW as BMW part number16117190946 (16-11-7-190-946) and is described as Genuine BMW Diesel Fuel Pump/Fuel Level Sensor for the M57 powered E90 335d, as offered in model years 2009, 2010, and 2011.
This is a Genuine BMW diesel fuel pump with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.
BMW Fitments:
3 Series
E90 / E91 / E92 / E93 (06-13) > 335d