KCGLOBAL Mass Air Flow (MAF) Sensor 3L3A-12B579-BA 6‑Pin OEM‑Fit Restores Accurate Airflow

This KCGLOBAL MAF sensor is a brand-new, direct-replacement electronic sensor designed to match OEM fit and function for a range of late-model Ford, Lincoln and Mazda vehicles. It replaces several OE part numbers and is built to restore accurate airflow readings after a failed or degraded original sensor. Installing the correct MAF can clear drivability issues tied to incorrect air measurement when paired with proper intake maintenance.

Which vehicles and part numbers does this MAF sensor replace?

This KCGLOBAL unit is compatible with many Ford and Lincoln platforms and replaces multiple OE references. Check the included list against your vehicle’s part number to confirm compatibility before purchase.

• Replaces OE references: 86-50031, 3L3Z-12B579-BA, 3L3A-12B579-BA, AFLS-131 and related numbers.
• Fits: Ford Focus (2004–2007), Fusion (2004–2007), Five Hundred (2005–2006), Taurus (2004–2006), Mustang (2005–2006), Thunderbird (2004–2005).
• Also compatible with Crown Victoria (2006), Lincoln Zephyr (2006), LS (2003–2006), Town Car (2005–2006), Mark LT (2006), Navigator (2006) and select Mazda models using the same part.

How does this replacement help with drivability and engine performance?

A correctly functioning MAF sensor provides the engine control unit accurate airflow data so fuel metering and ignition timing remain within design range. Replacing a faulty sensor can reduce rough idle, stumbling under load, and improve throttle response when the underlying issue is an MAF fault.

• Restores accurate intake-air measurement to improve fuel trim and idle stability.
• Helps reduce or eliminate MAF-related check engine codes once installed and when intake is clean.
• Supports consistent acceleration and smoother throttle response in affected vehicles.

What should I check and do before installing this MAF sensor?

Proper diagnosis and intake maintenance help ensure the new sensor works as expected. The manufacturer advises inspecting and cleaning the air box and replacing the air filter first; contaminated intakes can cause the Check Engine Light to persist even after installing a new MAF.

• Verify vehicle fitment and OE part number match before purchase and installation.
• Replace the air filter and inspect the air box for oil, debris or leaks prior to fitting the new MAF.
• Follow standard torque and electrical connection practices; clear codes after installation if required.

Is this sensor new, and what quality assurances are provided?

KCGLOBAL supplies this MAF sensor as a 100% new part manufactured to meet expectations for fit, form and function. It is not rebuilt or remanufactured and is intended to meet OEM-level standards for materials and design.

• Shipped as a brand-new unit, not a used or rebuilt sensor.
• Engineered to meet OEM specifications for physical fit and electrical characteristics.
• Intended for professional and do-it-yourself installations when fitment is confirmed.

Who is this for: Drivers and technicians who own Ford, Lincoln or compatible Mazda vehicles from the listed model years and need a reliable, direct-fit replacement MAF sensor. It’s suited for anyone troubleshooting MAF-related codes or drivability issues and who will perform intake maintenance before the swap. Always confirm fitment and follow manufacturer guidance for installation and diagnostics.