Partschoice MAF Sensor Direct-Fit 6‑Prong for Ford Explorer/Ranger & Mazda B4000 — 15ms Response, <2% Tolerance

This direct-fit replacement MAF sensor is made for 2001–2005 Ford models, select 2002–2005 Mercury vehicles, and the 2004 Mazda B4000. Constructed from plastic and aluminum, the unit offers fast 15 ms response time and tight output curve tolerance under 2%, delivering reliable airflow readings to the ECU. It includes multiple interchange part numbers (74-50011, XF2Z12B579AB, XF2F12B579AB, 1L2Z12B579BARM, 1F2213210R0A, 1L2Z12B579BA) for easy cross-referencing during purchase or repair.

How will this MAF sensor affect engine performance and emissions?

By accurately sensing both volume and density of intake air, the sensor helps the engine control unit calculate the correct fuel delivery. That balance supports smoother idling, consistent throttle response, and more stable combustion under varying loads. While it does not alter hardware tuning by itself, a functioning MAF is essential for the engine to meet expected running and emissions behavior.

• Measures airflow to the ECU for correct fuel calculations
• Fast 15 ms response time for timely readings
• Output curve tolerance < 2% for consistent sensor behavior

Is this sensor compatible with my vehicle?

This Partschoice unit is compatible with 2001–2005 Ford Explorers, many 2002–2005 Mercury models, 2001–2003 Ford Rangers, and the 2004 Mazda B4000. Confirm fit by matching your OEM or interchange numbers to the list provided; the included interchange part numbers make cross-referencing straightforward. If unsure, compare the electrical connector (6-pin) and mounting dimensions to your old sensor.

• Fits specified Ford, Mercury, and Mazda model years listed
• Compatible interchange numbers included for verification
• 6-prong electrical connector and compact dimensions (8.5 x 7.5 x 5.5 cm)

What are the installation steps and maintenance tips?

Installation is designed to be user-friendly: disconnect the negative battery terminal, loosen the air intake band clamps, unplug the electrical harness, remove the old sensor and insert the new unit, then reattach clamps and reconnect the battery. Cleaning periodically with approved MAF cleaner extends service life; avoid touching the sensing element directly. If you encounter any issues after installation, contact seller support for troubleshooting or replacement.

• Disconnect negative battery terminal before starting
• Loosen intake clamps, unplug 6-pin harness, swap sensor, and retighten
• Use MAF-specific cleaner for safe maintenance; don’t use harsh solvents

What are the physical and electrical specs I should know?

The sensor body combines plastic and aluminum for durability while keeping weight low and dimensions compact. It meets tight performance specs with an output curve tolerance under 2% and a 15 ms response time for prompt readings under changing engine conditions. The product listing includes exact interchange numbers for confirming electrical and fitment compatibility with your vehicle.

• Material: plastic and aluminum; color: black
• Dimensions: 3.35 x 2.95 x 2.17 inches (8.5 x 7.5 x 5.5 cm)
• Electrical: 6-prong connector; output tolerance < 2%; response time 15 ms

Who is this for: This Partschoice MAF sensor is aimed at DIY mechanics, independent repair shops, and vehicle owners who need a reliable, direct-fit replacement for the listed Ford, Mercury, and Mazda models. It's a good option for drivers diagnosing poor idle, rough acceleration, or suspected airflow sensor failure, and for anyone who wants a cost-effective OEM-style swap backed by part-number cross-reference compatibility.