Denso 671-4200 Spark Plug Wire Set

Denso 671-4200 Ignition Wire Set

Denso 671-4200 is a spark plug wire set built to match factory-installed form, fit, color, and performance. It is a direct OE-style ignition wire replacement for select Nissan D21, Pathfinder, and 720 applications with 8mm wire diameter.

Key Features

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

Product Details

The Denso First Time Fit line is engineered as an OE replacement solution for drivers who want the same basic form and performance characteristics as the original wire set. Part number 671-4200 is designed for select Nissan ignition systems and is listed for 1985-1989 Nissan 720, 1986-1989 Nissan D21, and 1987-1988 Nissan Pathfinder applications. This part cross-references NGK NX87 and Bosch 09178 for the same application.

For buyers searching for a Nissan D21 spark plug wire set, Nissan Pathfinder ignition wire replacement, or 8mm ignition wire set for Nissan 720, this Denso set provides the OE-style dimensions and terminal layout needed for a proper service replacement.

Common Issues This Part Can Address

• Cracked or heat-damaged ignition wire insulation
• Loose or worn spark plug boot connections
• Misfire caused by deteriorated wire terminals
• Hard starting related to weak secondary ignition transfer
• Routing or fit problems from non-OE wire dimensions

Installation Notes and Tips

Verify engine application, year, and ignition terminal style before installation. Match each wire to its original routing path to avoid crossfire, heat exposure, or tension at the boots. Inspect distributor cap, coil connections, and spark plugs at the same time so the new wire set is installed against clean, serviceable components.

Quality Assurance

Denso First Time Fit ignition wire sets are produced to OE/OES-level standards and are intended to replicate factory-installed fit and performance characteristics. The 671-4200 is a direct replacement choice for Nissan D21, Pathfinder, and 720 ignition service where an 8mm wire set is specified.