How is the Mass Air Flow Sensor Serviced on 2004 Ford Expedition?

To maintain the Mass Air Flow (MAF) sensor by disconnection, the battery ground cable and the sensing elements must not be interfered with. Open the air cleaner, disconnect the MAF sensor harness and release the air cleaner clamp. Detach the grommet and MAF sensor and make sure it is installed correctly to avoid unmetered air.

OEM 2004 Ford Expedition Mass Air Flow Sensor

MAF Sensor Meter

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2 Mass Air Flow Sensors found

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2004 Ford Expedition Mass Air Flow Sensor Part Number: XL3Z-12B579-BBRM
Product Specifications
- Other Name: Sensor Assembly; MAF Sensor Assembly; MAF Sensor; Air Mass Sensor
- Replaces: XL3Z-12B579-BARM, XL3Z-12B579-BA
- Base No.: 12B579
- Item Weight: 1.00 Pounds
- Item Dimensions: 6.4 x 6.0 x 4.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: XL3Z-12B579-BBRM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2004 Ford Expedition Submodels:
- Eddie Bauer, NBX, XLS, XLT, XLT Sport | 8 Cyl 4.6 L GAS, 8 Cyl 5.4 L GAS
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2004 Ford Expedition Mass Air Flow Sensor Part Number: 3L7Z-12B579-AARM
Product Specifications
- Other Name: Remanufactured Sensor Assembly; MAF Sensor Assembly; MAF Sensor; Air Mass Sensor
- Replaces: 3L7Z-12B579-AA
- Base No.: 12B579
- Item Weight: 1.00 Pounds
- Item Dimensions: 6.2 x 6.1 x 4.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 3L7Z-12B579-AARM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2004 Ford Expedition Submodels:
- Eddie Bauer, NBX, XLS, XLT, XLT Sport | 8 Cyl 4.6 L GAS, 8 Cyl 5.4 L GAS

2004 Ford Expedition Mass Air Flow Sensor

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2004 Ford Expedition Mass Air Flow Sensor Parts Q&A

Q: How is the Mass Air Flow Sensor Serviced on 2004 Ford Expedition?
A: To maintain the Mass Air Flow (MAF) sensor by disconnection, the battery ground cable and the sensing elements must not be interfered with. Open the air cleaner, disconnect the MAF sensor harness and release the air cleaner clamp. Detach the grommet and MAF sensor and make sure it is installed correctly to avoid unmetered air.