1.25168491 Mass Airflow Sensor Reference Part Number: The maf sensor replaces AF10043, 25318411, 2134160, 2133640, 868411, 868411, 15904068, 19330121, 25168491, 8159040680, 8193301210, 8253184110, 748411, 917826, 1581465, 2451107, 5S2636, SU1287, SU9516, SK2451107, 28411M, MA145, MAS0203. (Pls check your vehicle information before purchasing.) 2.Maf 25168491 Compatible with Vehicle Fitment: Our mass airflow sensor compatible with Chevy Silverado 1500 1999 06, for Silverado 1500 HD 01 03 05 06, 2500 99 04, 2500 HD, 3500 01 06, for Suburban 1500, for Tahoe 00 06, for Avalanche 1500 ; for GMC Sierra 1500 2500, for Yukon XL 1500 2500 2000 2006; for Buick Rainier 2004 2007; for Cadillac Escalade 2002 2006, for ESV 2003 2006, for EXT 2002 2006; for Oldsmobile Aurora 2001 2003; for Hummer H2 2003 2009; for Isuzu Ascender 2003 2006. 3.Mass Air Sensor Compatible with Chevy: 07 Silverado 1500 Classic 4.3L 4.8L 5.3L, 07 Silverado 1500/2500 HD Classic, 07 Silverado 3500 Classic, For 06 08 Trailblazer, Compatible with GMC: 05 09 Envoy 4.2L 5.3L, 07 Sierra 1500/2500/3500 HD Classic, 07 Sierra 3500 Classic 6.6L 8.1L, Compatible with Hummer: 05 07 H2, Compatible with Isuzu:, 03 06 Ascender 4.2L 5.3L, Compatible with Oldsmobile: 01 02 Aurora, Compatible with Pontiac: 05 06 GTO, 05 Bonneville, Compatible with Saab: 08 09 9 7X. 4.Automotive Replacement Mass Air Flow Sensor: The sensor maf also referred to as an air quality sensor, is a fundamental component designed to measure the volume of air entering the vehicle's engine. It enables precise fuel metering, crucial for optimizing engine performance and maintaining emission standards. This replacement sensor ensures accurate airflow detection, ensuring smooth vehicle operation and enhancing overall engine efficiency.