Regular Cab 4x4 8-foot Styleside box, 139-inch wheelbase · 4.2-liter OHV V6

2003 Ford F-150 STX XL Regular Cab 4x4 8-foot Styleside box — 4.2-liter OHV V6


Ford's 2003 brochure and specification matrix lists this STX XL chassis and powertrain. Cab, wheelbase, drivetrain, engine, transmission, appearance-package, alternative-fuel, and performance-model restrictions are preserved rather than cross-multiplied.

2003 Ford F-150 lightning pickup truck, front three-quarter view
Exact 2003 F-150 reference photograph; exact configuration not verified ·

Photo: “2003 Ford F150 Lightning (16868937720).jpg” by Kieran White from Manchester, England / Wikimedia Commons, licensed under CC BY 2.0. Cropped to 16:9.

Factory configuration

What this model is

Trim
XL
Body style
Regular Cab 4x4 8-foot Styleside box, 139-inch wheelbase
Engine
4.2-liter OHV V6
Transmission
4-speed automatic
Edition
STX XL

Configuration-specific ownership

Maintenance for this exact configuration

These items are filtered to the engine, transmission, trim, and model-year applicability recorded for this configuration. Broad Amazon category searches are suppressed here; shopping links appear only beside catalog-backed part numbers.

Service desk

What this car needs & when

Use this as a service-planning checklist for 2003 Ford F-150 STX XL Regular Cab 4x4 8-foot Styleside box — 4.2-liter OHV V6. Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.

Service topics
5
Factory intervals
4
Fitment-scoped
5
Exact references
5

Before orderingIdentify your engine, options and build date.Part numbers and sizes can change within one model year. Shopping links appear only for catalog-backed references; still verify the listing against your vehicle before ordering.

  • Engine oil and filter

    Exact reference available

    Applies to: 2003 · United States

    Published interval: 5,000 mi / 6 months · Normal schedule, whichever comes first.

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    4.2L V6

    Motorcraft FL-400-S

    Applies to: 2003 · 4.2-liter OHV V6 · United States

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    Verified ordering references

    • Service replacementMotorcraft FL-400-S

      Qty. 1 · Engine oil filter · catalog-listed

      Ford's 2003 factory table lists FL-400-S for 4.2-liter OHV V6; confirm the installed engine and VIN before ordering.

      Catalog: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

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  • Engine air filter

    Exact reference available

    Applies to: 2003 · United States

    Published interval: 30,000 mi · Normal schedule; dusty operation requires more frequent service.

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    Naturally aspirated V6 and V8

    Motorcraft FA-1632

    Applies to: 2003 · 4.2-liter OHV V6, 4.6-liter SOHC Triton V8, 5.4-liter SOHC Triton V8 · United States

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    Verified ordering references

    • Service replacementMotorcraft FA-1632

      Qty. 1 · Engine air-filter element · catalog-listed

      Ford's 2003 factory table lists FA-1632 for 4.2-liter OHV V6 and 4.6-liter SOHC Triton V8 and 5.4-liter SOHC Triton V8; confirm the installed engine and VIN before ordering.

      Catalog: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

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  • Fuel filter

    Exact reference available

    Applies to: 2003 · 4.2-liter OHV V6, 4.6-liter SOHC Triton V8, 5.4-liter SOHC Triton V8, supercharged 5.4-liter SOHC Triton V8 · United States

    Published interval: 30,000 mi · Gasoline models under the normal schedule.

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    Verified ordering references

    • Service replacementMotorcraft FG-986B

      Qty. 1 · Fuel filter · catalog-listed

      Ford's 2003 factory table lists FG-986B for 4.2-liter OHV V6 and 4.6-liter SOHC Triton V8 and 5.4-liter SOHC Triton V8 and supercharged 5.4-liter SOHC Triton V8; confirm the installed engine and VIN before ordering.

      Catalog: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

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  • Spark plugs

    Exact reference available

    Applies to: 2003 · United States

    Published interval: 100,000 mi · Gasoline engines under the normal schedule.

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    4.2L V6

    Motorcraft AGSF-34EE

    Applies to: 2003 · 4.2-liter OHV V6 · United States

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    Verified ordering references

    • Service replacementMotorcraft AGSF-34EE

      Qty. 1 · Platinum spark plug · catalog-listed

      Ford's 2003 factory table lists AGSF-34EE for 4.2-liter OHV V6; confirm the installed engine and VIN before ordering.

      Catalog: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

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  • PCV valve

    Exact reference available

    Applies to: 2003 · United States

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    4.2L V6

    Motorcraft EV-251

    Applies to: 2003 · 4.2-liter OHV V6 · United States

    Source: Ford — 2003 F-150 Owner's Guide, third edition · Motorcraft Part Numbers table — engine columns and spark-plug footnotes · checked

    Verified ordering references

Sources

  1. Ford Division — 2003 F-150 brochure and specification matrix (preserved PDF)

Other 2003 configurations

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