Denso 671-4040 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set 671-4040

Denso 671-4040 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 1996-1997 Chevrolet S10, GMC Sonoma, and Isuzu Hombre applications.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing
• Silicone spark plug boot material for heat resistance and flexibility
• 180-degree spark plug end boot design
• 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 focuses on factory-style replacement parts, and this ignition wire set follows that approach with OE-matched construction and performance characteristics. For Chevrolet S10, GMC Sonoma, and Isuzu Hombre owners searching for a 7mm spark plug wire set, part number 671-4040 provides the correct style of ignition lead for these model years while maintaining the original fit and connection style.

This part cross-references NGK IX53 for the same application.

Common Issues It Can Address

• Misfires caused by worn or heat-damaged plug wires
• Hard starting related to weak ignition transfer
• Rough idle from deteriorated wire insulation
• Voltage leakage from cracked or aged boots
• Loss of ignition performance on high-mileage vehicles

Installation Notes

Verify engine application and wire routing before installation. Match each lead to the original routing path and terminal style to avoid crossfire or connection issues. Inspect spark plugs, distributor cap, and coil connections at the same time so the new wire set can perform as intended.

Quality Assurance

Denso First Time Fit ignition wire sets are engineered to align with OE/OES standards for construction and performance. The 671-4040 is built as an OE-style replacement for 1996-1997 Chevrolet S10, 1996-1997 GMC Sonoma, and 1996-1997 Isuzu Hombre applications.