Fitment: Fits Ford Excursion 2003-2005 and F-250/350/450/550 Super Duty 2003-2007 with a 6.0L V8 Diesel. Reference Numbers: 3L3Z-12B579-ARM, 3L3Z-12B579-AB, 3L3U-12B579-AA, 3L3Z12B579ARM, 3L3Z12B579AB, 3L3U12B579AA, AFLS181RM, MA337, 917-966, 917966 Specifications: Number of Bolt Holes: 2; Terminal Quantity: 6; Terminal Type: Blade; Mounting Type: Bolt on; Housing Materials: Aluminum Housing; Material: PBT Materials & 40% Fiberglass; Color: Gray Advantages: Built with durable materials and advanced production technology to extend service life. Delivers stable performance and responsive sensing, meeting or exceeding OEM specifications. Direct installation based on the original car size. Function: The mass air flow sensor sits between the air filter and throttle body. It measures the amount of air drawn into the engine. The sensor signal is sent to the ECU to determine the correct fuel amount for the engine, maintaining an optimal air-fuel ratio. Applications: - Replacement during routine maintenance on Ford Excursion 2003-2005 or Ford F-250/350/450/550 Super Duty 2003-2007 with 6.0L Diesel. - Used in repair shops as an OEM-grade, bolt-on replacement to restore accurate air measurement. - Suitable for fleet maintenance and DIY repairs to improve engine responsiveness and fuel control.