Bosch Mass Air Flow (MAF) sensor for the BMW N63TU twin-turbo 4.4L V8. It measures intake air volume so the DME can calculate correct fueling; wear or contamination causes inaccurate readings that show up as rough idle, hesitation, reduced power, poor economy, or a check-engine light before eventual stalling.

Fitment: BMW N63TU 4.4L V8 models - F10/F07 550i (incl. xDrive), F01/F02 750i/750Li, F12/F13 650i, F15/F16 X5/X6 xDrive50i (confirm exact chassis at checkout).