Hot-Film Air Mass Meter (N47N), BMW - F30/F31 328d, F25 X3 28d

This part is listed by BMW as BMW part number 13628506408 (13-62-8-506-408) and is described as Genuine BMW Hot-Film Air Mass Meter for N47N diesel engine on F30/F31 328d, F25 X3 28d.

This is a Genuine BMW HFM 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.