E5T63271 PYFS-13-215 PYNM-13-215 Mass Air Flow Maf Meter Sensor For Mazda 3 6 For CX-3 CX-30 CX-5 MX-5 For Miata 2.0L 2.5L Direct replacement for a proper fits and easy installation, the MAF sensor can easily be located beside the air intake box inside the engine bay. It works even better and lasts longer. Function The air mass flow sensor is used to measure the intake air volume and intake temperature of the engine to help control its speed. MAF is a sensor used to determine the mass flow of air entering a fuel injected internal combustion engine. Before installing the MAF, make sure clean the air engine system and replace the sensor. The Air Flow Sensor is one of the important sensors of an EFI engine. It converts the incoming air flow into an electrical signal and sends it to the ECU, and then precisely controls the intake air flow, thereby enhancing engine performance.