Champion 7406 Spark Plug
OE Quality 60-Day Returns
Champion
 Double Platinum Power

Champion 7406 Spark Plug

Brand Champion 7406
Center Electrode Tip Material Platinum
Classification Champion Double Platinum
Electrical Terminal Type Non-Removable Nut
Ground Electrode Core Material Platinum
Ground Electrode Quantity 1
Hex Size 0.546
Hex Size 14.000
Hex Type Hex
Insulator Height 0.12
Manufacturer Heat Range 9
Plug Type RET9ZPMPB
Reach 1.043
Resistor Type Yes
Seat Type Tapered
Thread Diameter 0.470
Thread Diameter 12.000
Product line Double Platinum Power
Fits Ford, Lincoln, and Mercury · 44 vehicles

Double Platinum Power. Champion spark plug line for sharper spark focus and stronger performance.

Platinum electrodes. Fine-wire center and pad ground electrodes help deliver maximum life.

Heat-Active alloy promotes efficient combustion for consistent ignition performance.

Cross-references 8L3E12405BB, HJFS24FP and PZNAR6A11H for the same application. See all 5.

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Champion Double Platinum Power Spark Plug 7406

Champion Double Platinum Power spark plug 7406 is built for OE-style ignition performance in select Ford, Lincoln, and Mercury applications. It uses platinum on both the center and ground electrodes to support a sharper spark focus and longer service life, while the Heat-Active alloy helps maintain consistent performance under changing engine temperatures.

Key Features

  • Platinum fine-wire center electrode for focused ignition
  • Platinum pad ground electrode for extended wear resistance
  • Heat-Active alloy construction for stable performance
  • Resistor design for reduced electrical noise
  • Tapered seat spark plug with 12 mm thread diameter and 1.043 in reach
  • Non-removable nut terminal and hex design for standard service tools

Product Details

The Champion Double Platinum Power line is aimed at drivers who want OE-matched ignition characteristics with durable electrode materials. Part number 7406 is a Double Platinum classification plug with a 9 heat range, platinum center electrode tip, platinum ground electrode core material, and a tapered seat. It is a direct-fit style spark plug for 2008-2014 Ford Expedition, 2008-2014 Lincoln Navigator, 2008-2010 Ford Explorer, 2008-2010 Ford Explorer Sport Trac, 2008-2010 Ford F-150, 2008-2010 Ford F-250 Super Duty, 2008-2010 Ford F-350 Super Duty, 2008-2010 Ford Mustang, 2008-2010 Mercury Mountaineer, and 2008 Lincoln Mark LT applications listed in the fitment data. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Can Address

  • Rough idle caused by worn spark plug electrodes
  • Hard starting from weak or inconsistent spark output
  • Misfire conditions related to aged ignition components
  • Reduced throttle response from degraded plug performance
  • Service intervals shortened by standard copper plug wear

Installation Notes and Tips

Verify the vehicle’s original plug type, thread diameter, reach, and gap before installation. Fitment notes vary by model year, including OE-type applications and specific gap requirements such as 0.041 in, 0.042 in, or 0.044 in on listed Ford, Lincoln, and Mercury vehicles. For 2008 applications, confirm the cam cover date and coil boot configuration noted in the fitment data before replacing plugs. Use the correct torque procedure for tapered-seat spark plugs and inspect ignition coils and boots during service.

Quality Assurance

Champion’s Double Platinum Power design combines platinum electrode materials with Heat-Active alloy construction to support consistent ignition performance and long service life in OE-style applications.

Related reading

This part fits 44 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2014FordExpedition5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2014LincolnNavigator5.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2013FordExpedition5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2013LincolnNavigator5.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2012FordExpedition5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2012LincolnNavigator5.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2011FordExpedition5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2011LincolnNavigator5.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordExpedition5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordExplorer4.6LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordExplorer Sport Trac4.6LV8N/AGap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordF-1504.6LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordF-1505.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordF-250 Super Duty6.8LV10N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordF-250 Super Duty5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordF-350 Super Duty6.8LV10N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordF-350 Super Duty5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010FordMustang4.6LV8N/AGap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010LincolnNavigator5.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2010MercuryMountaineer4.6LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordExpedition5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordExplorer4.6LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordExplorer Sport Trac4.6LV8N/AGap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordF-1504.6LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordF-1505.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordF-250 Super Duty6.8LV10N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordF-250 Super Duty5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordF-350 Super Duty6.8LV10N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordF-350 Super Duty5.4LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009FordMustang4.6LV8N/AGap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009LincolnNavigator5.4LV8N/AOE Type; Gap 0.042 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2009MercuryMountaineer4.6LV8N/AOE Type; Gap 0.041 (in); Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordExpedition5.4LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordExplorer4.6LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 11/30/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordExplorer Sport Trac4.6LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 11/30/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordF-1505.4LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordF-250 Super Duty6.8LV10N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordF-250 Super Duty5.4LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordF-350 Super Duty6.8LV10N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordF-350 Super Duty5.4LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008FordMustang4.6LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 11/30/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008LincolnMark LT5.4LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008LincolnNavigator5.4LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 10/09/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
2008MercuryMountaineer4.6LV8N/AMatch to Original; OE Type; Gap 0.044 (in); with OE Brown Coil Boots; with 12 (mm) Diameter Threads Below Seat; Cam Cover Date After 11/30/2007; Plug Type Number RET9ZPMPB; Double Platinum Power
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
8L3E12405BBHJFS24FPPZNAR6A11HRET9ZPMPB4SP509