Genuine Subaru Air Fuel Ratio Sensor 22641-AA391

Optimize engine performance and fuel efficiency with the Genuine Subaru Air Fuel Ratio Sensor 22641-AA391 (SKU 22-127). This premium OEM wideband oxygen sensor is engineered by Subaru to precisely monitor the air-fuel mixture in your engine, enabling the ECU to maintain optimal combustion, reduce emissions, and maximize fuel economy for Subaru applications.

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Key Features & Benefits

• Genuine Subaru Quality - OEM component built to exact factory specifications
• Wideband Technology - More accurate air-fuel ratio monitoring than standard oxygen sensors
• Improved Fuel Economy - Helps maintain optimal fuel mixture for better mileage
• Reduced Emissions - Keeps your vehicle running clean and compliant
• Enhanced Engine Performance - Prevents rich or lean running conditions
• Durable Construction - Built to withstand extreme temperatures and harsh conditions
• Direct Replacement - Perfect fit for Subaru vehicles

Technical Specifications

• Subaru Part Number: 22641-AA391 (22641AA391)
• Sensor Type: Air Fuel Ratio Sensor (Wideband O2 Sensor / Lambda Sensor)
• Application: Subaru vehicles
• Weight: 0.25 kg

Vehicle Compatibility

This genuine Subaru air fuel ratio sensor is compatible with various Subaru models. Always verify fitment for your specific vehicle.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

OEM Part Number Cross-Reference

This genuine Subaru air fuel ratio sensor replaces the following OEM part numbers:

• 22641AA390 (Subaru)
• 22641AA391 (Subaru)
• 22641AA220 (Subaru)
• EGO-127 / EGO127

Common Symptoms of Faulty Air Fuel Ratio Sensors

• Check engine light illuminated (P0130-P0167 codes)
• Poor fuel economy
• Rough idle or engine hesitation
• Failed emissions test
• Loss of power during acceleration
• Strong fuel odor from exhaust
• Black smoke from exhaust (running rich)
• Engine running lean or rich

What Does an Air Fuel Ratio Sensor Do?

The air fuel ratio sensor (also called a wideband oxygen sensor or lambda sensor) monitors the oxygen content in the exhaust gases with greater precision than standard oxygen sensors. This allows the engine control unit (ECU) to make fine adjustments to the fuel injection system, maintaining the ideal air-fuel mixture for optimal performance, fuel economy, and emissions control across all driving conditions.

Why Choose Genuine Subaru Sensors?

Genuine Subaru sensors are designed and manufactured to exact OEM specifications, ensuring perfect fit, accurate readings, and long-lasting reliability. Unlike aftermarket alternatives, genuine parts are tested to meet Subaru's stringent quality standards for your peace of mind.

Why Choose LM15 Motorsport?

We supply genuine Subaru air fuel ratio sensors with fast shipping across Australia. Every part is carefully inspected to ensure you receive authentic OEM components for reliable performance and emissions compliance.