Denso 671-6265 Spark Plug Wire Set

Denso 7mm Ignition Wire Set

Denso 671-6265 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct replacement for select Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer applications, with OE-style construction for consistent ignition transfer.

• 7mm insulation outside diameter for OE-style routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 120-degree spark plug end boot angle for specified engine layouts
• Female spark plug end terminal type
• Male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction

OE-Style Replacement Details

The Denso First Time Fit line focuses on direct-fit ignition components that mirror original equipment specifications. This Denso 671-6265 spark plug wire set is intended for drivers servicing ignition wear on 2005-2009 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2005-2009 Mercury Mountaineer models. It supports clean, consistent spark delivery for engines that rely on properly routed, correctly terminated ignition wires.

This part cross-references NAPA Mileage Plus 6716265 for the same application.

Vehicle Fitment

• Fits 2007-2010 Ford Explorer Sport Trac, N/A, 7mm
• Fits 2005-2009 Ford Explorer, N/A, 7mm
• Fits 2005-2009 Mercury Mountaineer, N/A, 7mm

What This Part Helps Address

• Misfires caused by worn or heat-damaged ignition wires
• Hard starting related to weak spark transfer
• Rough idle from deteriorated wire insulation or terminals
• Intermittent ignition performance from poor wire routing or boot fit
• Voltage leakage from aging spark plug wire insulation

Installation Notes and Tips

Verify wire routing against the original layout before removal, and replace one wire at a time when possible to preserve cylinder order. Confirm the 120-degree spark plug boot orientation and the male distributor/coil end terminal type match the vehicle’s ignition setup before installation. For best results, inspect spark plugs, coil connections, and nearby heat sources while servicing the ignition system.

Quality Assurance

Denso First Time Fit ignition wire sets are engineered to match OE-style specifications and are manufactured to meet or exceed OE/OES standards. The 7mm construction and silicone boot material support consistent fit and dependable ignition service on the listed Ford and Mercury applications.