The air mass meter is located in the engine compartment usually adjacent to the air filter assembly. The air mass meter or sometimes called the air flow meter is used to determine the airflow that is being delivered to your engine. The air mass meter does this by sending an electronic signal to the cars computer, and thus sends the correct signal to the fuel injectors that regulate the amount of fuel that is delivered to the engine. This product is of fine quality; it can make positive contribution to the efficiency of engine. Moreover we can develop new product according to the sample you send us For more information please feel free to contact us !