BMW 325i/328/525 6-Cylinder Air Flow Meter 13621432356 Precise Match

This 13621432356 MAF (mass air flow) meter is a direct replacement for the BMW factory part with identical OEM number and broad compatibility; no wiring changes needed. It precisely measures intake air mass and sends data to the ECU to adjust fuel and ignition, ensuring combustion efficiency. Compatible with BMW 325i, 328i, 525i and other six-cylinder models such as E46, E39. Replacing can solve rough idle, loss of power on acceleration, and high fuel consumption; power response will be noticeably smoother. If cold start is difficult, exhaust emits black smoke, or the engine warning light comes on, the problem is likely a worn-out MAF; replacing early protects the catalytic converter.