This mass air flow sensor is just what you need to get your vehicle in good working order again!


  • Brand New Mass Airflow Sensor
    • Not remanufactured
    • No core charge
  • Replaces dealer part numbers: 3L3Z-12B579-BA, 3W7Z12B579BA
  • Fits in between air cleaner and air intake hose
  • Is 100% computer tested prior to leaving manufacturer

Installation Notes:

1. Make sure the air filter is in good condition and replace if necessary.
2. Clean out and inspect the intake hose when replacing this part. Moving the intake hose during replacement can loosen dirt which can then damage the new sensor.

This item is an electrical part. These units are tested prior to shipment.

Our electrical and electronic parts are subject to strict quality control testing.  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed

Note:  You may be required to reset the vehicle’s computer after installation of this part.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

  1. step : Removing the Air Intake Box (0:30)
    • Disconnect the mass air flow sensor wiring harness
    • Open the air box clips
    • Loosen the air intake hose clamps with a flat blade screwdriver
    • Open the air intake box
    • Remove the air intake box from the hose
  2. step : Removing the Mass Air Flow Sensor (1:04)
    • Remove the four 10mm bolts on the Mass Air Flow Sensor
    • Insert the new mass air flow sensor
    • Insert and tighten the four 10mm bolts
  3. step : Installing Air Intake Box (1:38)
    • Connect the air intake hose to the air intake box
    • Insert the air intake box into its slots and connect the clamps
    • Tighten the air intake hose clamp with a flat blade screwdriver
    • Connect the mass air flow sensor wiring harness

Tools needed for replacement:

    Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket

5.0 / 5.0
1 Review
5 Stars
4 Stars
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1 Stars
It was easy to order, the price was great and it works like a charm. I have recommended this website to all my friends.
June 13, 2018
1 month ago
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Vehicle Fit

  • 2003-2004 Ford Crown Victoria Air Flow Meter Sensor excluding Police Package
  • 2003-2004 Lincoln Town Car Air Flow Meter Sensor
  • 2003-2004 Mercury Grand Marquis Air Flow Meter Sensor

This part replaces:

  • Hollander 336-05236
  • OE # 3W7Z12B579BA
Part #: 1AEAF00081

Ships Same Day for orders placed by 4 P.M. ET

How-to Video:

(02:33 min)