2021 Ford Explorer Spark plugs
Depends on your version. Choose yours, or compare them here.
- 2.3L EcoBoost SP-578 part number
- 3.0L SP-578 part number
- 3.3L SP-520 part number
SP-578
Part number · 2.3L EcoBoost
SP-578
Part number · 3.0L
SP-520
Part number · 3.3L
2021 Ford Explorer Owner's Manual, PDF pages 391, 392 and 393
SP-578Open the manual at this page ↗Added Oct 18, 2026 · Updated
See where it's printed
Spark plugs (part number) · 2.3L EcoBoost · PDF page 391
SP-578
Spark plugs (part number) · 3.0L · PDF page 392
SP-578
Spark plugs (part number) · 3.3L · PDF page 393
SP-520
2021 Ford Explorer Owner's Manual, PDF page 391
SP-578Open the manual at this page ↗Added Oct 18, 2026 · Updated
See where it's printed
Spark plugs (part number) · 2.3L EcoBoost · PDF page 391
SP-578
2021 Ford Explorer Owner's Manual, PDF page 392
SP-578Open the manual at this page ↗Added Oct 18, 2026 · Updated
See where it's printed
Spark plugs (part number) · 3.0L · PDF page 392
SP-578
2021 Ford Explorer Owner's Manual, PDF page 393
SP-520Open the manual at this page ↗Added Oct 18, 2026 · Updated
See where it's printed
Spark plugs (part number) · 3.3L · PDF page 393
SP-520
See every quote (3 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| 2.3L EcoBoost | SP-578part number | “SP-578” | PDF page 391 ↗ |
| 3.0L | SP-578part number | “SP-578” | PDF page 392 ↗ |
| 3.3L | SP-520part number | “SP-520” | PDF page 393 ↗ |
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