A-Premium Mass Air Flow Sensor for Subaru — 5-Pin 22680AA380, OE-Fit Bolt-On, ±3% Accuracy

A-Premium's 5-pin Mass Air Flow Sensor (22680AA380) accurately measures incoming air for compatible Subaru engines to help the ECU calculate proper fuel delivery.

This replacement MAF sensor fits a wide range of Subaru models and engine variants from late-2000s through the 2010s. Built from reinforced PBT with glass fiber and aluminum alloy components, the unit is a bolt-on swap designed to match the factory mounting pattern and electrical interface. It provides a calibrated airflow measurement across the specified range so the vehicle management system can adjust fueling and ignition timing under varying conditions.

How will this MAF sensor affect my Subaru's performance?

Replacing a failing MAF restores accurate intake-air readings so the engine control unit can set correct fuel trims. That can reduce rough idling, improve throttle response, and normalize fuel economy when the original sensor is out of tolerance.

• Five-pin electrical connector matches the OEM wiring harness for straightforward replacement.
• Measurement accuracy within ±3% across the 0–9.25 m³/min range.
• Bolt-on mounting with two holes mirrors factory fitment to minimize installation adjustments.
• Materials selected for heat and vibration resistance to match under-hood conditions.

Which Subaru models and reference numbers are compatible?

This MAF lists compatibility with many Subaru Forester, Impreza, Legacy, Outback, WRX and Crosstrek model years and engines—check fitment against your vehicle before ordering. It also cross-references common OEM and aftermarket part numbers so you can confirm interchangeability.

• Compatible with Forester (2009–2018), Impreza (2008–2016), Legacy (2008–2018), Outback (2008–2018), WRX/WRX STI, XV Crosstrek depending on engine.
• Common reference numbers: 22680AA380, 22680AA38A, 197400-5111, MAS0317, AF10345, and others.
• Works with H4 2.0L/2.5L and select H6 3.6L engines noted in the fitment list.
• Always verify VIN, engine code, or OEM part number before purchase for correct match.

What are the electrical and mechanical specs I should know?

The unit uses a five-pin pin-style terminal and mounts with two bolts in the factory location. It's rated for standard 12-volt vehicle electrical systems and designed to measure airflow up to 9.25 m³/min with tight tolerance limits for accurate engine control input.

• Terminal quantity: 5 (pin type) to match Subaru wiring connectors.
• Mounting: 2 bolt-holes for direct bolt-on replacement.
• Material: PBT with 30% glass fiber and aluminum alloy components for durability.
• Measurement: 0–9.25 m³/min with ±3% specified accuracy under normal conditions.

Before replacing the sensor, scan for trouble codes and confirm the MAF is the root cause; some drivability issues stem from vacuum leaks, intake restrictions, or wiring faults rather than the sensor itself. A-Premium recommends professional diagnosis if you are uncertain, and the product ships with a one-year unlimited-mileage guarantee for added peace of mind.

Who is this for: This A-Premium 5-pin MAF sensor is intended for Subaru owners and independent mechanics seeking a direct-fit aftermarket replacement for models listed in the compatibility table. It’s best for anyone who needs an OEM-style electrical interface, bolt-on installation, and reliable airflow readings to restore factory-like engine management without modifying the intake plumbing.