This part is listed by BMW as BMW part number 13537805734 (13 53 7 805 734) and is described as the fuel pressure regulating valve located on the fuel rail on E90 335d and E70 X5 35d.
This is a Genuine BMW M57 pressure regulating valve 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.
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.
BMW Fitments:
3 Series
E90 / E91 / E92 / E93 (06-13) > 335d
X5 Series
E70 X5 (07-13) > X5 xDrive35d