Air Mass Flow Meter Sensor 1L5F12B579AB A precision air mass flow (MAF) sensor identified by part number 1L5F12B579AB. This sensor measures the mass of air entering the engine so the engine control unit (ECU) can calculate the correct fuel delivery and maintain airfuel ratio. Key benefits Restores accurate air measurement: Helps the ECU make precise fueling corrections to reduce rough idle, hesitation, and poor acceleration caused by a faulty MAF sensor. Improves fuel economy and emissions: By providing correct airflow data, it supports efficient combustion and can help recover lost fuel efficiency. Resolves diagnostic issues: Replacing a failing sensor with the correct part number can clear related trouble codes and stabilize drivability. What this part does and why you need it Functionality: Senses intake air mass and communicates that information electrically to the vehicle's engine management system. Problem solved: Replaces a worn, dirty, or failed MAF sensor that causes check engine lights, inaccurate fuel mixture, stalling, or reduced engine performance. Value: Using the correct part number 1L5F12B579AB ensures compatibility with the vehicle systems that expect that specific sensor calibration and signal characteristics. Key attributes Identifying model: 1L5F12B579AB (use this part number to verify fitment) Function: Mass air flow measurement for engine management Performance: Provides the airflow signal required by the ECU for correct fueling and emissions control Form and fit: Intended to the original unit that uses the 1L5F12B579AB specification (confirm vehicle/service manual for installation and compatibility) Typical applications and use cases and maintenance: a failed or degraded MAF sensor during routine engine troubleshooting to restore drivability and resolve relevant diagnostic trouble codes. DIY vehicle : A direct replacement option for owners who have diagnosed MAFrelated issues and need the correct part number for a proper restore. service: Used by technicians when restoring correct airflow measurement for vehicles that require the 1L5F12B579AB sensor specification. Installation and checks (recommendations) Confirm vehicle compatibility by matching the vehicle's required part number to 1L5F12B579AB before . Follow the vehicle manufacturer's service instructions when removing and installing the MAF sensor; handle the sensing element carefully and avoid contamination. After installation, clear codes if present and verify engine operation and fuel trim readings per diagnostic procedures. Use the part number 1L5F12B579AB to ensure you get the correct air mass flow meter sensor for vehicles that require this specific component.