Strong and efficient engine operation requires precise measurement of both the volume and density of the air entering the engine. An air flow (MAF) sensor is relied on to accurately measure and communicate air flow information to the engine control unit (ECU). And as the world's leading manufacturer of MAF sensors, you can count on every Hitachi Astemo air flow sensor to deliver precise results that will help your engine operate at maximum efficiency.Each component in our MAF sensors is made from premium-grade raw materials All dimensions and components are manufactured to tolerances that always meet or exceed OE requirements