Bosch Mass Air Flow Sensor - 0280218067 - Bosch Mass Air Flow (MAF) Sensors are designed to detect the amount of air entering the engine and provide an accurate measurement to the engine control unit. The MAF sensor is a key component of the engine management system, and its failure can cause poor engine performance, reduced fuel economy, and increased emissions. This Bosch MAF Sensor (Part Number 0280218067) is a direct replacement for the factory part and is designed to meet or exceed OE specifications.