Denso 671-4061 Spark Plug Wire Set

Denso 8mm Spark Plug Wire Set

Denso First Time Fit ignition wire sets are built to match factory-installed wire sets in form, fit, color, and performance. This Denso 8mm spark plug wire set, part number 671-4061, is a direct OE-style replacement for select Ford, Mercury, and Mazda applications.

With silicone spark plug boot material, a 120-degree spark plug end boot, and female terminal ends, this wire set is built for clean routing and secure connections. The 8.00 mm insulation outside diameter supports consistent ignition performance in vehicles such as the Ford Escape, Ford Focus, and Mazda Tribute.

Key Features

• Denso First Time Fit ignition wire set for OE-style replacement
• 8mm insulation outside diameter for factory-style fitment
• Silicone spark plug boot material for heat resistance and flexibility
• 120-degree angled spark plug end boot for routing clearance
• Female spark plug end terminal type and female distributor/coil end terminal type
• Fits select Ford, Mercury, and Mazda models from 1999-2004

Product Details

The Denso 671-4061 spark plug wire set is engineered to mirror original equipment specifications, making it a practical choice for drivers replacing worn ignition leads on applications such as the 2001-2004 Ford Escape, 2000-2004 Ford Focus, and 2001-2004 Mazda Tribute. The First Time Fit product line focuses on OE-style construction and consistent performance characteristics, which helps maintain proper ignition routing and connection integrity. This part number 671-4061 also cross-references NAPA Mileage Plus 6714061 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from inconsistent ignition transfer
• Cracked or heat-aged wire insulation
• Poor terminal connection at the spark plug or coil/distributor end

Installation Notes and Tips

Verify routing against the original wire layout before removal, and match each lead to the correct cylinder position during installation. Confirm fitment for your exact vehicle configuration, especially on 1999 Ford Contour and 1999 Mercury Mystique models built from 5/3/99, as well as 2000 Ford Contour and 2000 Mercury Mystique applications. Compatible With 2001-2004 Ford Escape, 2000-2004 Ford Focus, 2001-2004 Mazda Tribute, 2003 Ford Escort, 2000 Ford Contour, and 2000 Mercury Mystique as listed in the fitment data. This part number 671-4061 is also listed for 1999 Ford Contour and 1999 Mercury Mystique from 5/3/99.

Quality Assurance

Denso positions the First Time Fit line as an OE-style ignition wire solution built to meet or exceed OE/OES standards in construction and performance. That focus on factory-matched form and materials supports consistent replacement quality for ignition service.