Hot Film Mass Air Flow Sensor 3L3A-12B579-BA AFH60-M19 3W4Z12B579AC MF0930

3L3A-12B579-BA Mass Air Flow Sensor AFH60-M19/3W4Z12B579AC/MF0930/3L3Z-12B579-BA

Quality sensors are manufactured to meet or exceed original equipment specifications. This sensor is an insert-only type unit, meaning it must be fitted within the original housing using the original mounting hardware.

Part number 3L3A-12B579-BA is widely cross-referenced across multiple automotive brands and aftermarket manufacturers. The following cross-references have been identified:

Additional cross-reference numbers that have been associated with this part include:

• 74-50031, 7450031

• 86-50031, 8650031

• 917-822, 917822

• 213-3604, 2133604

• AF10140

• SU9779

• 1581403

• MF0930

• AFLS131

• MAF0012, MAF0014

• AFH60M19

• 5S8314

• 245-1108

• MAS4540

The 3L3A-12B579-BA Mass Air Flow Sensor is designed for a wide range of Ford, Lincoln, and Mazda vehicles across multiple model years.

Important Note: This sensor is used across a wide range of Ford, Lincoln, and Mazda platforms with various petrol and diesel engines. Always verify compatibility with your specific vehicle's year, make, model, engine size, and original part number before purchase. The sensor is an insert-only type and must be fitted within the original housing using the original mounting.

A failing or failed 3L3A-12B579-BA Mass Air Flow Sensor can produce a range of noticeable driveability issues. The MAF sensor is responsible for measuring intake air mass so the ECM can determine proper fuel delivery. When this sensor provides inaccurate readings or fails completely, engine performance is directly affected.

Common OBD-II codes associated with MAF sensor failure include:

• P0100 – Mass Air Flow Circuit Malfunction

• P0101 – Mass Air Flow Circuit Range/Performance Problem

• P0102 – Mass Air Flow Circuit Low Input

• P0103 – Mass Air Flow Circuit High Input

• P0104 – Mass Air Flow Circuit Intermittent

• P1102 – MAF Sensor In-Range Lower Failure

1. Disconnect Test: A simple diagnostic method is to unplug the MAF sensor connector. If the engine idle or performance improves significantly with the sensor disconnected, the MAF sensor is likely faulty.

2. OBD-II Scan: Retrieve diagnostic trouble codes to confirm MAF-related faults.

3. Visual Inspection: Inspect the sensor element for damage or contamination.

4. Check for Air Intake Leaks: Before replacing the MAF sensor, check for simple air intake leaks, as they can cause identical symptoms.

5. Check Fuel Pressure: In some cases, symptoms like stalling may be caused by low fuel pressure rather than a faulty MAF sensor.

6. Check Wiring Connections: Ensure the wiring harness connector and terminals are clean and secure.

Note: Symptoms may appear intermittently. A MAF sensor can fail gradually, with performance deteriorating over time as the hot-film sensing element ages or becomes contaminated. The most common cause of MAF sensor failure is contamination of the sensing element by dirt and moisture.

When purchasing a replacement 3L3A-12B579-BA Mass Air Flow Sensor, consider the following factors to ensure proper fitment, performance, and longevity.

The 3L3A-12B579-BA sensor is used across a wide range of vehicles including Ford, Lincoln, and Mazda models. Always confirm your specific vehicle's year, make, model, and engine size before purchasing.

Critical: Before purchasing, confirm that the part number on your existing sensor matches 3L3A-12B579-BA or one of its equivalents such as 3L3Z12B579BA. Small deviations in the part number, e.g., different letters at the end, can have a big impact on interoperability with your vehicle.

Critical: The 3L3A-12B579-BA sensor is supplied without housing – it is an insert-only type unit. It must be fitted within the original housing using the original mounting. Verify that your existing housing is in good condition before purchasing.

This sensor features:

• 6-prong blade male terminal

• 1 female connector

• Oval connector shape

Before ordering, verify that the plug configuration and pin position match your vehicle's wiring harness connector.

While aftermarket alternatives may be available at lower price points, quality varies significantly. Quality sensors are manufactured to meet or exceed original equipment specifications. Premium options contain the best materials and electronics found in OE systems. Some lower-cost alternatives may use inferior technology and provide unreliable readings.

Ensure the replacement is a hot-film type MAF sensor as specified for this application. Incorrect sensor types will not provide proper readings to the ECM.

• Location: The MAF sensor is located in the intake duct between the air filter and throttle body

• Quantity: One sensor per vehicle

• DIY Feasibility: Replacement is generally straightforward for mechanically inclined individuals

• Caution: Handle the sensing element with care; contamination from dirt, moisture, or oil can cause premature failure

Before replacing the MAF sensor, confirm that it is the root cause of your vehicle's symptoms. Perform the disconnect test or consult a professional diagnostic scan. Other issues such as vacuum leaks, clogged air filters, low fuel pressure, or faulty oxygen sensors can produce similar symptoms.

Quality MAF sensors typically come with warranties. Some suppliers offer warranties ranging from 1 year to longer periods. Consider the warranty coverage when comparing options, as this can be an indicator of manufacturer confidence in product quality.

Purchase from reputable suppliers with positive customer feedback. Reviews often provide valuable insight into product quality and compatibility.

The most common cause of MAF sensor failure is contamination of the sensing element by dirt and moisture. Ensure your air filter is replaced at recommended intervals to prevent premature sensor failure. Also check that the intake system is properly sealed to prevent unfiltered air from entering.

Check the supplier's return policy before purchase. Some suppliers offer 30-day return policies or 14-day return policies. Ensure you have the option to return the sensor if it does not fit your vehicle.