Size: WLT-QPKL001 Replacement MAF Sensor Compatible with BMW 325Ci 2003 2004 2005 2006; BMW 325i 2002 2003 2004 2005; BMW X3 2004 2005; BMW Z4 2003 2004 2005 mass air flow MAF. Replaces OE#: 21323-11319A 13-62-7-566-984 13627566984, 13627513957, SK2451174, 5WK96471, 336-60632, 74-10124, 7410124, AF10223, MA396, 5S2991, MAS0289, MF21174, A2C59511576, 13627566983, 30611231, MHK100620, 336-60632, LMF194 86181 MAF1146 74-10124 MAF. Direct Replacement for the factory Mass Air Flow Sensor. Mass Air Flow Meter MAF Sensor measures the volume and density of air entering the engine, providing highly accurate airflow readings to the ECU over a wide range of ambient temperatures. NOTICE Please clean out the air box and replace the air filter before installing this Mass Air Flow Sensor Meter, or the Code and Check Engine Light may keep showing even if you replace a new MAF. Meets OEM specifications, Easy to Install and Clean, Fast Response, High durability. NOTE Before purchase this MAF Meter, please use the year/make/model drop down bar confirm the compatibility or description to confirm the compatibility. FAERSI mass air flow made of superior durable material, Built to strict quality control standards, Meets or Exceeds OEM Specs, Every product must take inspected and tested multiple times before the shipment.