Before Ordering, Please Make Sure Your Model And Year Is Covered By This Accessory; Car Mass Air Flow Sensor For Saab 9-3 93 1.8 & 20 AFH60M-18 12788131 24452491 The air mass sensor can measure the mass flow of air entering a fuel-injected internal combustion engine； Designed to provide long-lasting performance and reliability and improve driving smoothness； Easy To Install;