Mass Air Flow Sensor (Air Flow Meter) - Function: measures the mass of intake air so the engine control unit can calculate the correct air–fuel ratio, supporting stable idle, responsive acceleration, and efficient combustion. - Key identifiers: Part number 6C11 12B579 AA; Model AFH70M 54; Product number 9658127480; also listed as 9657127480. - Benefits: provides accurate air flow data to help engine performance, fuel economy, and emissions control when within specification. - Compatibility and notes: designed to match the listed part numbers and model for replacement use. Specific vehicle compatibility, size, and material details are not provided in this description. - Use scenarios: 1) Replace a faulty MAF sensor in a vehicle requiring these part numbers to restore smooth operation. 2) Use as an OEM-style replacement part in repair shops or parts inventories. 3) Diagnostics and ECU calibration work to verify air flow readings during troubleshooting.