In this case the wires were completely black, it was a surprise the engine ran at all! This sensor had been on the car for over 200,000 miles.
Once you have the 2 pieces seperted you can see the 2 wires that make up the MAF sensor unit. On the G20/ Primera the Mass Air flow Sensor looked to be glued to the tube section/housing, so a flat head screwdriver was needed to prise apart the two components. Once the screws were removed the sensor housing itself had to be pried away from the housing.
The head of the screws where severely corroded so a pair of pliers were necessary to remove them. In this case it was located with 2 screws. Once you have removed the section of the intake that holds the Mass Airflow Sensor you have to remove the sensor from the housing. When you have found it, remove the section of plastic that contains the sensor itself. Before the throttle body on normally aspirated cars and before the turbo (usually) on uh, turbo cars. It is located somewhere in the engine’s intake system. The location will vary depending on your car but it is usually pretty obvious where it is. In this photo the sensor is old and the screws which hold the MAF sensor unit in the main housing had corroded. We need to remove the sensor itself from the housing. The Mass Airflow Sensor is usually enclosed in a hard plastic housing.
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