12151 Hitachi Air Flow Meter U12F01AFS

Genuine Hitachi Air Flow Meter U12F01AFS

Ensure precise air intake measurement and optimal engine performance with the Hitachi Air Flow Meter U12F01AFS (SKU 12-151). This premium OEM-quality mass air flow sensor is engineered by Hitachi ATESMO to accurately measure the volume and density of air entering your engine, providing critical data to your ECU for optimal fuel delivery, ignition timing, and engine performance for Subaru Impreza GD/GG/G3 EJ204 and Subaru Liberty BL/BP EJ204 applications.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

Key Features & Benefits

• Genuine Hitachi ATESMO Quality - OEM-grade component built to exacting standards
• Precise Air Flow Measurement - Accurately measures air mass for optimal fuel delivery
• Improved Engine Performance - Ensures proper air-fuel mixture for maximum power
• Enhanced Fuel Efficiency - Precise air measurement optimizes fuel consumption
• Reduced Emissions - Proper air-fuel ratio reduces harmful emissions
• Durable Construction - Built to withstand extreme temperatures and airflow conditions
• Direct Replacement - Perfect fit for Subaru Impreza GD/GG/G3 EJ204 & Liberty BL/BP EJ204
• Easy Installation - Plug-and-play replacement for original air flow meter

Technical Specifications

• Hitachi ATESMO Part Number: U12F01AFS
• Component Type: Mass Air Flow Sensor (MAF Sensor / Air Flow Meter)
• Primary Application: Subaru Impreza GD/GG/G3 EJ204 & Liberty BL/BP EJ204
• Weight: 0.25 kg

Vehicle Compatibility

This Hitachi air flow meter is designed for:

• Subaru Impreza GD with EJ204 engine
• Subaru Impreza GG with EJ204 engine
• Subaru Impreza G3 with EJ204 engine
• Subaru Liberty BL with EJ204 engine
• Subaru Liberty BP with EJ204 engine

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

OEM Part Number Cross-Reference

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

• U12F01AFS (Hitachi ATESMO)
• 22680AA360 (Subaru)
• AFM151 / AFM-151

Common Symptoms of Faulty Air Flow Meters

• Check engine light illuminated (P0100-P0104 codes)
• Poor acceleration or loss of power
• Rough idle or engine hesitation
• Increased fuel consumption
• Black smoke from exhaust (rich condition)
• Engine stalling or hard starting
• Poor engine performance under load
• Erratic idle speed

What Does an Air Flow Meter Do?

The Mass Air Flow (MAF) Sensor measures the volume and density of air entering the engine, providing the engine control unit (ECU) with critical data about air mass. The ECU uses this information to calculate the optimal air-fuel mixture and adjust fuel injection accordingly. Accurate air flow measurement is essential for optimal engine performance, fuel efficiency, and emissions control. A properly functioning air flow meter ensures your engine receives the precise amount of fuel needed for complete combustion.

Why Choose Genuine Hitachi ATESMO Air Flow Meters?

Genuine Hitachi ATESMO air flow meters are designed to meet or exceed original equipment specifications, ensuring accurate air mass measurement, long-lasting reliability, and optimal engine operation. Using genuine parts ensures proper fitment and maintains your vehicle's performance standards.

Why Choose LM15 Motorsport?

We supply genuine Hitachi 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 precise air flow measurement.

Need help with fitment or installation? Contact our expert team for advice specific to your Subaru Impreza GD/GG/G3 EJ204 or Liberty BL/BP EJ204.