Denso 671-6121 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set

Denso 671-6121 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It uses silicone spark plug boot material and female terminals for OE-style connection quality on supported Chrysler, Dodge, and Plymouth applications.

The Denso First Time Fit line focuses on direct replacement ignition components that meet or exceed OE/OES standards. For drivers servicing a Chrysler Town & Country, Dodge Caravan, or Plymouth Voyager, this spark plug wire set supports consistent ignition transfer and clean routing with a 135-degree spark plug end boot design.

Key Features

• Part number: 671-6121
• 7mm insulation outside diameter for OE-style wire sizing
• Silicone spark plug boot material for heat resistance and flexibility
• Female spark plug end terminal type and female distributor/coil end terminal type
• 135-degree angled spark plug end boot for application-specific routing
• Built to meet or exceed OE/OES standards
• Compatible with Chrysler, Dodge, and Plymouth ignition wire applications from the early 1990s

Detailed Description

Denso 671-6121 is an ignition wire set for vehicles that require a 7mm OE-style replacement with female terminals at both ends. The silicone boot construction helps maintain secure connection points at the spark plug and distributor or coil end, while the angled boot design supports proper wire routing in tighter engine bays. This part cross-references NAPA Mileage Plus 6716121 for the same application.

Compatible With 1990-1995 Chrysler Town & Country, N/A; 1990-1995 Dodge Caravan, N/A; 1990-1995 Dodge Grand Caravan, N/A; 1990-1995 Plymouth Grand Voyager, N/A; 1991-1995 Plymouth Voyager, N/A; 1990-1993 Chrysler Dynasty, N/A; 1990-1993 Chrysler Imperial, N/A; and 1990-1993 Chrysler New Yorker, N/A. Use this Denso wire set when replacing worn ignition leads on these Chrysler, Dodge, and Plymouth models.

What It Helps Address

• Misfires caused by worn or damaged spark plug wires
• Hard starting related to weak ignition transfer
• Rough idle from deteriorated wire insulation or boot wear
• Intermittent ignition performance from loose terminal connections
• Routing issues when replacing aging OE wire sets on supported vehicles

Installation Notes and Tips

Match each wire to the original routing path before removal, and verify terminal style and boot angle against the existing setup. Inspect spark plugs, distributor cap, and coil connections during service so the new wire set can perform as intended. Confirm vehicle application by year, make, and model before installation on Chrysler Town & Country, Dodge Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, Plymouth Voyager, Chrysler Dynasty, Chrysler Imperial, or Chrysler New Yorker.

Quality Assurance

Denso First Time Fit ignition wire sets are engineered to mirror factory-installed wire sets in fit and performance, with construction that meets or exceeds OE/OES standards. The 7mm design and silicone boot materials reflect an OE-style replacement approach for dependable ignition service.