How to service and repair the Mass Air Flow Sensor on 2002 Ford Focus?

First remove the air cleaner outlet pipe to service the Air Flow Meter/Sensor. Next, unplug the electrical connection of the Mass Air Flow (MAF) sensor and remove the MAF sensor. In order to re-install, just do the reverse.

OEM 2002 Ford Focus Mass Air Flow Sensor

MAF Sensor Meter

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2002 Ford Focus Mass Air Flow Sensor Part Number: 1L5Z-12B579-ARRM
$272.22 MSRP: $376.59
You Save: $104.37 (28%)
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Product Specifications
- Other Name: Remanufactured Sensor Assembly; MAF Sensor; Air Mass Sensor
- Replaces: 1L5F-12B579-AB, AFLS-129, 1L5Z-12B579-AB
- Base No.: 12B579
- Item Weight: 0.50 Pounds
- Item Dimensions: 4.2 x 3.3 x 4.3 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 1L5Z-12B579-ARRM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
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Fits the following 2002 Ford Focus Submodels:
- SE, SVT, ZTS, ZTW, ZX3, ZX5 | 4 Cyl 2.0 L GAS
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2002 Ford Focus Mass Air Flow Sensor Part Number: YS4Z-12B579-FRM
Product Specifications
- Other Name: Sensor Assembly; MAF Sensor; Air Mass Sensor
- Replaces: YS4Z-12B579-FARM, YS4Z-12B579-FA, YS4Z-12B579-GB, YS4Z-12B579-GA
- Base No.: 12B579
- Item Weight: 0.80 Pounds
- Item Dimensions: 5.5 x 4.7 x 5.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: YS4Z-12B579-FRM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2002 Ford Focus Submodels:
- LX, S, SE, SES, Sony Limited Edition, ZTS, ZTW, ZX3, ZX4, ZX5, ZXW | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS

2002 Ford Focus Mass Air Flow Sensor

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2002 Ford Focus Mass Air Flow Sensor Parts Q&A

Q: How to service and repair the Mass Air Flow Sensor on 2002 Ford Focus?
A: First remove the air cleaner outlet pipe to service the Air Flow Meter/Sensor. Next, unplug the electrical connection of the Mass Air Flow (MAF) sensor and remove the MAF sensor. In order to re-install, just do the reverse.