Whenever the Scion engine works, it creates high level of thermal energy through continuous fuel combustion. That heat, however, must be maintained in a certain range in order not to risk the life of the engine. Since combustion is a continuous process, the heat would accumulate. Significantly, constant reduction of heat is the solution, and that's exactly what the cooling system is for. Besides that mentioned system, the air which is being fed to each cylinder also aids in maintaining the engine's normal operational temperature level. But the air amount of air permitted into the engine need to be regulated, or else, not enough power would be produced because heat won't reach the ideal level. A Scion air mass meter handles this. It's a device with high sensitivity which makes it very efficient in accomplishing its job. But its sensitivity makes it very vulnerable to defects, that even a simple spill of water or grease will cause it damage. Replacement Scion air mass meter is recommended when the part gets damaged. Scion air mass meter is placed near the engine compartment, close to the air filter assembly. Since air mass meter can easily become faulty, taking care of it is very necessary so to provide your longer efficient service. When damaged, too much or insufficient quantity of air delivered into the engine will cause imbalance in the fuel and air mixture. This will result to less complete combustion process, leaving more unburned air and fuel. The exhaust system, especially the catalytic converter, will have to deal with more toxic elements. When such condition persists, the power production, cat con lifespan, fuel mileage, and the overall performance of the Scion will be affected. Finding a good and durable Scion replacement air mass meter is the first step in solving the problem. And for that matter, be glad to have come in this site for that product is readily available at this online auto parts and accessory store.