Mass Air Flow Sensor
WARNING: This page is about a different variant/trim than selected.
The Mass Air Flow Sensor 
is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The MAF sensor controls the temperature of the heater in sensing element to a certain amount. The temperature distribution around the heater changes according to the increase in intake air volume. The change is detected by a thermistor and the air volume data is sent to ECM by the MAF sensor.
 Courtesy of NISSAN NORTH AMERICA, INC.
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