The Bosch Mass Air Flow Sensor - 0280218198 is a precision electronic device used to measure the amount of air entering the engine of a vehicle. It is a crucial component in the engine management system, as it provides the engine control unit with accurate information about the air flow, which is essential for proper fuel delivery and combustion. The sensor uses a hot wire or hot film to measure the air flow and then sends this data to the engine control unit. This allows the engine to adjust its fuel delivery and maintain optimal performance. The Bosch Mass Air Flow Sensor - 0280218198 is designed for durability and reliability, making it a popular choice among automotive manufacturers. It is compatible with a wide range of vehicles and is an essential part of ensuring efficient engine operation.