Ford Mass Air Flow Sensor JX6A-12B579-CA Engine Intake Metering

This mass air flow sensor is designed for 2004-2009 Ford Focus (1.8L/2.0L gasoline) and 2005-2011 Mazda3 (2.0L); precisely matches OEM intake system. Core function is real-time monitoring of intake air volume and sending data to ECU to optimize air-fuel ratio; ensures stable combustion efficiency and power output. OEM number JX6A-12B579-CA; cross-checkable with original parts to avoid mis-purchase. Replacement difficulty moderate; use T20 star wrench to remove; clean intake connections and check seal; sensor uses high-sensitivity hot-film chip with 15% faster response than traditional hot-wire, reducing carbon-induced signal drift; bulk purchase for repair shops.