Denso 671-6220 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set

The Denso 671-6220 spark plug wire set is built to match factory-installed wire sets in form, fit, color, and performance. It is a direct OE-style ignition wire replacement for Hyundai and Kia applications that need consistent spark delivery and dependable terminal fit.

Denso’s 7mm product line focuses on OE-style dimensions and construction details for a clean replacement on import vehicles. This set uses a 7.00 mm insulation outside diameter, a 90-degree spark plug end boot, a female spark plug terminal, and a male distributor/coil end terminal for the specified applications.

• OE-style replacement ignition wire set for Hyundai Tiburon, Santa Fe, Sonata, Kia Optima, and Kia Magentis
• 7.00 mm insulation outside diameter for factory-style routing and fit
• 90-degree spark plug end boot for tight engine bay routing
• Female spark plug end terminal and male distributor/coil end terminal
• Spark plug boot material: Sil PBT Sil
• Direct replacement part number: Denso 671-6220

Detailed Product Overview

The Denso 671-6220 is a spark plug wire set engineered for OE/OES-level replacement needs. It is designed to match the original wire set’s physical layout and performance characteristics, helping maintain proper ignition transfer across the engine. This part cross-references NAPA Mileage Plus 6716220 for the same application. Use it for 2003-2007 Hyundai Tiburon, 2001-2006 Hyundai Santa Fe, 1999-2005 Hyundai Sonata, 2001-2005 Kia Optima, and 2001-2004 Kia Magentis, all in 7mm configurations.

Common Issues This Part Addresses

• Misfires caused by worn or damaged ignition wires
• Hard starting related to inconsistent spark delivery
• Rough idle from deteriorated wire insulation or terminals
• Voltage leakage from cracked or aged wire boots
• Loss of ignition performance in high-mileage Hyundai and Kia engines

Installation Notes and Tips

Match each wire to the original routing before removal to preserve firing order and prevent crossfire. Confirm the 90-degree spark plug boot clears nearby components and that the female spark plug terminal and male coil/distributor terminal seat fully at each connection point. Verify application details against the vehicle’s engine configuration before installation.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to OE/OES standards for form, fit, color, and performance. The 671-6220 follows that OE-style approach for direct replacement on the listed Hyundai and Kia applications.