Denso 671-6079 Spark Plug Wire Set

Denso 671-6079 Ignition Wire Set

Denso First Time Fit ignition wire sets are built to match the factory-installed wire set in form, fit, color, and performance. This Denso 671-6079 spark plug wire set uses 8mm insulation and silicone spark plug boot material for OE-style service on select Ford Ranger, Explorer, Aerostar, Mazda B4000, and Mazda Navajo applications.

Key Features

• 8mm insulation outside diameter for OE-style wire routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 115-degree spark plug end boot angle for proper terminal alignment
• Female spark plug end terminal type
• Male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction and performance

Product Details

The Denso First Time Fit line is engineered as a direct replacement solution for ignition systems that need factory-style dimensions and terminal configuration. Part number 671-6079 is a spark plug wire set for 1990-1996 Ford Aerostar, 1991-1996 Ford Explorer, 1990-1996 Ford Ranger, 1994-2000 Mazda B4000, and 1991-1994 Mazda Navajo models with 8mm wire specification. This part cross-references NGK FDX010 and Bosch 09645 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or damaged ignition wires
• Hard starting from weak spark delivery
• Rough idle related to deteriorated wire insulation
• Intermittent ignition performance from cracked boots or poor terminal contact
• Voltage leakage in aging Ford Ranger or Mazda B4000 ignition systems

Installation Notes and Tips

Verify engine application and wire routing before installation. Match each lead to the correct cylinder and distributor or coil terminal, and confirm the 115-degree boot orientation clears nearby components. Inspect plugs, cap, and coil condition at the same time to avoid repeat ignition faults. Compatible With 1990-1996 Ford Aerostar, 1991-1996 Ford Explorer, 1990-1996 Ford Ranger, 1994-2000 Mazda B4000, and 1991-1994 Mazda Navajo, this wire set is intended for direct replacement use on listed vehicles only.

Quality Assurance

Denso First Time Fit ignition wire sets are manufactured to align with OE/OES standards for construction and performance, giving technicians an OE-style replacement option for service work on Ford and Mazda ignition systems.