This part is listed by BMW as BMW part number 13627548103 and is described as Hot-Film Air Mass Meter as used on the E70 X5 with the 48i xDrive (V8) drivetrain offered in the 2007, 2008, 2009, and 2010 model years.
The HFM (Hot Film Meter, or MAF sensor) measures air density and temperature so the engine computer can make fuel adjustments on the fly. There are several possible failures with an HFM and not all will trigger a fault code. Poor sensor data can make the car run rough, surging idle, poor drivability, and decreased MPG. First try cleaning the HFM and inspect all of the intake boots for cracks or loose fitment. If problems persist it may be time for a new HFM.
For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.
BMW Fitments:
X5 Series
E70 X5 (07-13) > X5 4.8i (07-10)
