Hitachi MAF0124 Mass Air Flow Sensor

Hitachi MAF0124 Mass Air Flow Sensor

Hitachi MAF0124 is a mass air flow sensor for select Subaru applications, including WRX and Forester models. It measures incoming air volume and airflow characteristics so the engine control system can maintain accurate fuel delivery and emissions control.

Key Features

• Precision sensing elements for accurate air flow measurement
• High-quality components for durability in engine bay conditions
• 100% air flow tested for application-specific performance
• Calibrated for each vehicle application to support OE emission standards
• Protected circuitry and a contaminant bypass port where applicable
• OE-approved design for direct replacement service

Detailed Description

The Hitachi MAF0124 is built for precise air metering in Subaru intake systems. By reporting the amount and characteristics of air entering the engine, this sensor helps the engine management system maintain proper air-fuel control, idle quality, and emissions performance. This part cross-references Delphi AF10538 and Standard Ignition MAS0518 for the same application. It is a direct-fit choice for 2017-2021 Subaru WRX, 2017-2018 Subaru Forester, 2014-2016 Subaru Forester, and 2015-2016 Subaru WRX applications. The Hitachi MAF0124 is also referenced by OE number 22680AA410.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Check engine lights related to mass air flow sensor faults
• Hesitation or poor throttle response from incorrect air metering
• Fuel trim issues caused by contaminated or failing sensor output
• Emissions test failures tied to air measurement errors

Installation Notes

Verify the terminal type before installation; listed applications use blade terminals, and some fitments note five terminals with no housing included. Inspect the intake tract, air filter, and sensor connector for contamination or damage before replacing the sensor. For best results, install on the correct Subaru WRX or Subaru Forester application listed for your vehicle and clear any stored diagnostic trouble codes after service.

Quality Assurance

Hitachi manufactures this mass air flow sensor with application-specific calibration and air flow testing to support accurate readings and OE-level emission control performance.