The Bosch Mass Air Flow Sensor - 0280218449 is a high-quality automotive sensor designed to accurately measure the amount of air entering the engine. It is a crucial component in the engine management system, providing important data for fuel injection, ignition timing, and emissions control. The sensor uses a hot wire or hot film technology to measure the air flow and sends this information to the engine control unit. It is compatible with a wide range of vehicles and is a direct replacement for the original equipment. This Bosch sensor is known for its durability, reliability, and precise readings, making it a popular choice among automotive enthusiasts and professionals.