Walker 921-2007 Ignition Coil
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Walker
 ThunderSpark

Walker 921-2007 Ignition Coil

Brand Walker 921-2007
Product line ThunderSpark
Fits Ford, Lincoln, and Mercury · 47 vehicles

ThunderSpark line. Walker ignition coil built for dependable spark delivery.

Ignition coil. Converts low voltage into the high voltage needed for ignition.

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Walker ThunderSpark Ignition Coil 921-2007

Walker ThunderSpark ignition coil 921-2007 is a direct-fit ignition coil for select Ford, Lincoln, and Mercury applications. It is listed for 2004-2008 model-year coverage and supports vehicles such as the Ford F-150, Mustang, Expedition, Explorer, and Lincoln Navigator.

Key Features

  • Ignition coil for select Ford, Lincoln, and Mercury vehicles
  • Walker ThunderSpark product line
  • Direct ignition coil application for listed fitments
  • Fits models across 2004-2008 coverage, including Ford F-150 and Mustang
  • Part number 921-2007 for accurate ordering and lookup

Fitment Details

  • Fits 2008 Ford Expedition, N/A, w/ Black; ThunderSpark
  • Fits 2008 Ford Explorer, N/A, w/ Black; ThunderSpark
  • Fits 2008 Ford Explorer Sport Trac, N/A, w/ Black; ThunderSpark
  • Fits 2008 Ford F-150, N/A, w/ Black; ThunderSpark
  • Fits 2008 Ford F-250 Super Duty, N/A, w/ Black; ThunderSpark
  • Fits 2008 Ford F-350 Super Duty, N/A, w/ Black; ThunderSpark
  • Fits 2008 Ford Mustang, N/A, w/ Black; ThunderSpark
  • Fits 2008 Lincoln Mark LT, N/A, Color-Black; Direct Ignition Coil Boot; ThunderSpark
  • Fits 2008 Lincoln Navigator, N/A, w/ Black; ThunderSpark
  • Fits 2008 Mercury Mountaineer, N/A, w/ Black; ThunderSpark
  • Fits 2005-2007 Ford Expedition, N/A, ThunderSpark
  • Fits 2006-2007 Ford Explorer, N/A, ThunderSpark
  • Fits 2007 Ford Explorer Sport Trac, N/A, ThunderSpark
  • Fits 2004-2007 Ford F-150, N/A, ThunderSpark
  • Fits 2005-2007 Ford F-250 Super Duty, N/A, ThunderSpark
  • Fits 2005-2007 Ford F-350, N/A, Single Coil
  • Fits 2005-2007 Ford F-350 Super Duty, N/A, ThunderSpark
  • Fits 2005-2007 Ford Mustang, N/A, ThunderSpark
  • Fits 2006-2007 Lincoln Mark LT, N/A, ThunderSpark
  • Fits 2005-2007 Lincoln Navigator, N/A, ThunderSpark
  • Fits 2006-2007 Mercury Mountaineer, N/A, ThunderSpark

Common Uses

  • Misfire diagnosis on Ford F-150 and Mustang ignition systems
  • Restoring spark output on Expedition, Explorer, and Navigator engines
  • Replacing a worn ignition coil that causes rough idle
  • Addressing hard-start or intermittent ignition performance concerns
  • Correcting engine hesitation under load

Installation Notes

Verify the vehicle year, make, model, and notes before installation. Match the existing coil style and connector details to the listed application, especially on 2008 Lincoln Mark LT and 2005-2007 Ford F-350 entries with specific notes. Part number 921-2007 should be confirmed against the original coil before replacement.

Quality Assurance

Walker ThunderSpark is the identified product line for this ignition coil, and 921-2007 is cataloged for the listed Ford, Lincoln, and Mercury applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Related reading

This part fits 47 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2008FordExpedition—5.4LV8N/Aw/ Black; ThunderSpark
2008FordExplorer—4.6LV8N/Aw/ Black; ThunderSpark
2008FordExplorer Sport Trac—4.6LV8N/Aw/ Black; ThunderSpark
2008FordF-150—5.4LV8N/Aw/ Black; ThunderSpark
2008FordF-250 Super Duty—6.8LV10N/Aw/ Black; ThunderSpark
2008FordF-250 Super Duty—5.4LV8N/Aw/ Black; ThunderSpark
2008FordF-350 Super Duty—6.8LV10N/Aw/ Black; ThunderSpark
2008FordF-350 Super Duty—5.4LV8N/Aw/ Black; ThunderSpark
2008FordMustang—4.6LV8N/Aw/ Black; ThunderSpark
2008LincolnMark LT—5.4LV8N/AColor-Black; Direct Ignition Coil Boot; ThunderSpark
2008LincolnNavigator—5.4LV8N/Aw/ Black; ThunderSpark
2008MercuryMountaineer—4.6LV8N/Aw/ Black; ThunderSpark
2007FordExpedition—5.4LV8N/AThunderSpark
2007FordExplorer—4.6LV8N/AThunderSpark
2007FordExplorer Sport Trac—4.6LV8N/AThunderSpark
2007FordF-150—5.4LV8N/AThunderSpark
2007FordF-250 Super Duty—6.8LV10N/AThunderSpark
2007FordF-250 Super Duty—5.4LV8N/AThunderSpark
2007FordF-350—5.4LV8N/ASingle Coil
2007FordF-350 Super Duty—6.8LV10N/AThunderSpark
2007FordF-350 Super Duty—5.4LV8N/AThunderSpark
2007FordMustangGT4.6LV8N/AThunderSpark
2007LincolnMark LT—5.4LV8N/AThunderSpark
2007LincolnNavigator—5.4LV8N/AThunderSpark
2007MercuryMountaineer—4.6LV8N/AThunderSpark
2006FordExpedition—5.4LV8N/AThunderSpark
2006FordExplorer—4.6LV8N/AThunderSpark
2006FordF-150—5.4LV8N/AThunderSpark
2006FordF-250 Super Duty—6.8LV10N/AThunderSpark
2006FordF-250 Super Duty—5.4LV8N/AThunderSpark
2006FordF-350—5.4LV8N/ASingle Coil
2006FordF-350 Super Duty—6.8LV10N/AThunderSpark
2006FordF-350 Super Duty—5.4LV8N/AThunderSpark
2006FordMustang—4.6LV8N/AThunderSpark
2006LincolnMark LT—5.4LV8N/AThunderSpark
2006LincolnNavigator—5.4LV8N/AThunderSpark
2006MercuryMountaineer—4.6LV8N/AThunderSpark
2005FordExpedition—5.4LV8N/AThunderSpark
2005FordF-150—5.4LV8N/AThunderSpark
2005FordF-250 Super Duty—6.8LV10N/AThunderSpark
2005FordF-250 Super Duty—5.4LV8N/AThunderSpark
2005FordF-350—5.4LV8N/ASingle Coil
2005FordF-350 Super Duty—6.8LV10N/AThunderSpark
2005FordF-350 Super Duty—5.4LV8N/AThunderSpark
2005FordMustang—4.6LV8N/AThunderSpark
2005LincolnNavigator—5.4LV8N/AThunderSpark
2004FordF-150—5.4LV8N/AThunderSpark