Genuine Denso Air Flow Meter 197400-6040 (22680AA310)

Ensure precise engine performance and optimal fuel delivery with the Denso Air Flow Meter 197400-6040 (SKU 12-025). This premium OEM-quality mass air flow sensor is engineered by Denso to accurately measure the volume and density of air entering your engine, enabling the ECU to calculate the correct fuel injection and ignition timing for maximum power, efficiency, and smooth operation across Subaru and Mazda turbocharged applications.

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Key Features & Benefits

• Genuine Denso Quality - OEM-grade component built to exacting standards
• Precise Air Measurement - Accurately monitors air mass for optimal engine performance
• Turbo Applications - Designed for turbocharged engines requiring accurate airflow data
• Improved Fuel Economy - Ensures correct air-fuel mixture for better mileage
• Enhanced Engine Performance - Prevents rough running, hesitation, and power loss
• Durable Construction - Built to withstand harsh engine bay conditions
• Direct Replacement - Perfect fit for Subaru and Mazda turbo models

Technical Specifications

• Denso Part Number: 197400-6040 (1974006040)
• Sensor Type: Mass Air Flow Meter (MAF)
• Application: Turbocharged Subaru & Mazda vehicles
• Weight: 0.25 kg

Vehicle Compatibility

This Denso air flow meter is compatible with:

• Subaru Impreza Turbo
• Subaru Liberty Turbo
• Subaru Forester Turbo
• Mazda CX-7

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

OEM Part Number Cross-Reference

This Denso air flow meter replaces the following OEM part numbers:

• 22680AA310 (Subaru)
• AFM-025 / AFM025

Common Symptoms of Faulty Air Flow Meters

• Check engine light illuminated (P0100-P0104 codes)
• Poor acceleration or loss of power
• Rough idle or engine stalling
• Poor fuel economy
• Black smoke from exhaust (running rich)
• Engine hesitation or surging
• Hard starting or extended cranking
• Reduced boost pressure in turbo applications

What Does an Air Flow Meter Do?

The Mass Air Flow (MAF) meter measures the volume and density of air entering the engine. This critical data allows the engine control unit (ECU) to calculate the precise amount of fuel needed for optimal combustion. In turbocharged applications, accurate airflow measurement is especially important for maintaining proper boost levels and preventing engine damage from running too lean or too rich.

Why Choose Denso Air Flow Meters?

Denso is a world-leading OEM supplier of air flow meters, trusted by Subaru, Mazda, and other major manufacturers worldwide. Their MAF sensors are designed to meet or exceed original equipment specifications, ensuring accurate readings, long-lasting reliability, and optimal engine performance in demanding turbocharged applications.

Why Choose LM15 Motorsport?

We supply genuine Denso air flow meters with fast shipping across Australia. Every part is carefully inspected to ensure you receive the exact component your vehicle needs for reliable performance and accurate engine management.