BMW Mass Air Flow Sensor - 13621703275

A failing mass air flow sensor can cause numerous check engine codes. The sensors measure the amount of air entering the engine via the intake.  Mass Air Flow Sensor Failure Symptoms Check engine light illuminated with OBD codes related to MAF sensor faults Engine has rough idle and/or stalls Short term fuel trim is rich at idle or lean under load Constantly runs rich or lean Replaces BMW PN 13621703275 Fitment: 323i 1998-1999 (2) Air Mass Meter 323is 1998-1999 (2) Air Mass Meter 328i 1996-1999 (4) Air Mass Meter 328is 1996-1999 (4) Air Mass Meter 528i 1997-1998 (2) Air Mass Meter M3 1996-1999 (4) Air Mass Meter