Mass Airflow Sensor
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Mass Airflow (MAF) sensor measures flow of air entering engine. This measurement of airflow is a reflection of engine load (throttle opening). MAF sensor is located near air cleaner assembly.