The Bosch Mass Air Flow (MAF) sensor, also called an air mass sensor or MAF meter, measures the amount of air entering the engine. It sends this data to the engine control unit (ECU). The ECU uses it to calculate fuel delivery and ignition timing, so the engine can run efficiently, respond smoothly and keep emissions low. Key Features: Measures intake air mass accurately so the ECU can manage the air-fuel ratio Uses hot-film sensing technology, a design Bosch has refined over many years of OE supply Helps support smooth idle, steady acceleration and good fuel economy Built for durability against heat, vibration and the under-hood environment Quality controlled to meet the standards expected of an OE-level supplier Why Replace a MAF Sensor: A dirty or failing MAF sensor can cause a rough idle, hesitation, poor fuel economy, stalling, black smoke or a check engine light. Replacing it with a quality Bosch unit can restore proper air measurement and engine performance. Installation is usually simple, because the sensor plugs into the intake tract and an electrical connector. Select the correct part number for your application. Bosch is a global leader in automotive technology and a trusted name in engine management components. This product line gives you reliable, precise air mass measurement for daily driving and long-term dependability.