Mass Air Flow (MAF) Sensor – Interchange Part #1L3Z-12B579-AA
For 2000–2004 Ford F-150 5.4L & 2003–2004 Mustang 4.6L | Replaces 49-00269ON, AFH9002, MAF0046 & More | OEM-Spec Replacement
✅ Product Overview:
This is a brand-new Mass Air Flow (MAF) Sensor, engineered to precisely measure incoming air volume and temperature for optimal fuel delivery and engine performance.
Compatible with both standard gasoline and alternative-fuel (CNG/Bi-Fuel) versions of the 5.4L Triton V8, as well as supercharged and naturally aspirated 4.6L Modular V8s.
Key Specifications:
- Primary OEM Number: 1L3Z-12B579-AA
- Also Known As: MAF Sensor, Air Flow Meter
- Condition: 100% New – OEM Quality
- Package Includes: 1 × MAF Sensor Assembly
Extensive Interchange Part Numbers:
- 49-00269 ON, 49-00269ON
- 14900269-101, 14900269-102, 14900269-103
- 1L3F-12B579-AB, 1L3F12B579AB
- 1L3Z-12B579-AA, 1L3Z12B579AA
- 1L3Z-12B579-AARM, 1L3Z12B579AARM
- 20893M, 74-50028, AFH9002, MAF0046
Confirmed Vehicle Fitment:
- 2000–2003 Ford F-150 – 5.4L V8 (330 cu.in.)
• Gasoline (SOHC)
• CNG (Compressed Natural Gas)
• Bi-Fuel (Gas + CNG)
• Supercharged (Lightning models)
- 2001–2004 Ford F-150 – 5.4L V8 Gasoline (standard SOHC)
- 2004 Ford F-150 Heritage – 5.4L V8 (Bi-Fuel, CNG, or Gasoline)
- 2003–2004 Ford Mustang – 4.6L V8 (281 cu.in.)
• Naturally Aspirated (GT)
• Supercharged (SVT Cobra)
⚠️ Common Symptoms of a Faulty MAF Sensor:
• Check Engine Light with codes like P0100, P0101, P0102, P0103, P0171, P0174
• Rough idle or stalling
• Poor acceleration or hesitation
• Excessive fuel consumption
• Hard starting or no-start condition
Installation Notes:
- Located between the air filter box and throttle body
- Disconnect battery before replacement (recommended)
- Do not touch the sensor wires inside the housing—oil from skin can cause contamination
- Ensure intake tube is clean and free of cracks or leaks
- After installation, clear all fault codes using a scan tool
- Some vehicles may require a short drive cycle to relearn idle parameters
Note: This MAF sensor is used across multiple engine configurations—including high-output supercharged variants. It is designed to match OEM calibration for accurate airflow measurement under all operating conditions.
Disclaimer: “Ford,” “F-150,” “Mustang,” and “Triton” are registered trademarks of Ford Motor Company. This product is an aftermarket replacement engineered to meet OEM specifications but is not manufactured or endorsed by Ford.