This DELPHI Mass Air Flow (MAF) Sensor, part code AF10133-12B1, is engineered to precisely measure the amount of air entering your engine. Accurate airflow readings are crucial for the engine control unit (ECU) to determine the correct amount of fuel to inject, optimizing performance, fuel economy, and emissions. Trust DELPHI for reliable and high-quality sensor replacements that ensure your engine runs smoothly and efficiently.