A-Premium Mass Air Flow Sensor MAF 6-Pin Replacement for YC2F-12B579-BA — Direct-Fit, OE-Compatible

The A-Premium 6-pin Mass Air Flow (MAF) Sensor replaces part #YC2F-12B579-BA to restore accurate air measurement for compatible Ford, Lincoln and Mercury engines.

If your vehicle is showing reduced fuel economy, rough idle, or a check engine light tied to an airflow or fuel-trim code, a worn MAF sensor can be the cause. This A-Premium direct-fit replacement is engineered to match OE electrical characteristics and installation points so you can swap it in without modification and get back reliable airflow readings.

Which vehicles and engines will this sensor fit?

This sensor is designed for many Ford family models from the early 2000s, plus select Lincoln and Mercury vehicles. It covers V8 and V10 engines across trucks, vans, SUVs, and coupes where the original part number corresponds to YC2F-12B579-BA and related references.

• Ford F-150 (2003–2005) 4.6L V8 and Heritage 2004 4.6L
• Super Duty F-250/F-350/F-450 (2000–2004) and E-series vans (2000–2003) with 4.6L/5.4L/6.8L/5.4L V8 or V10
• Mustang (2002–2004) various GT and Mach 1 models; Explorer (2002–2003) 4.6L V8
• Lincoln Aviator (2003–2005), Town Car (2003–2004), Mercury models (2002–2004)

How does this MAF sensor meet technical and mounting requirements?

The unit uses a 6-pin pin-type electrical connector with two mounting bolt holes and a bolt-on installation pattern that aligns with factory housings. Materials and electrical specs are chosen to mirror OE behavior and withstand under-hood conditions.

• Connector: 6-pin pin terminals for direct electrical compatibility
• Mounting: two bolt holes, bolt-on replacement—no housing included
• Materials: PBT+GF30 body with aluminum alloy sections for thermal stability
• Electrical: maximum supply voltage 17 V, measurement range 0–820 kg/h ±2% accuracy

What performance changes should I expect after installation?

Installing a properly functioning MAF sensor helps the engine control unit calculate correct fuel delivery by accurately measuring intake air mass and density. That often reduces drivability issues that appear when a sensor fails or drifts out of tolerance.

• Improved fuel trim accuracy and combustion balance
• Reduction in erratic idle, hesitation, and poor throttle response
• Freshed diagnostic readings—intermittent airflow faults may clear
• Consistent readings across varying ambient temperatures

What reference numbers and compatibility details should I check before buying?

Confirm fitment by comparing your vehicle’s OEM part number to the references listed. This A-Premium sensor corresponds to several OE and aftermarket identifiers used across Ford group vehicles.

• Cross-references include: 74-50019, 7450019, 86-50019, 8650019, 869564
• Also matches identifiers: AFH7034, AFH8006D, 1L2Z12B579AAA, YC2F12B579BA and variants
• Verify engine displacement and year range for an exact match
• Check connector pin count (6 pins) and bolt-hole spacing on the old unit

Who is this for: This A-Premium 6-pin MAF sensor is intended for owners and technicians restoring proper air-mass measurement in early-2000s Ford, Lincoln and Mercury vehicles that use the YC2F-12B579-BA family of sensors. It’s suitable for DIY mechanics who want an OE-style direct-fit replacement, and fleet or repair shops that need a reliable, warrantied sensor option to troubleshoot airflow-related drivability problems.