Denso 671-4234 Spark Plug Wire Set

Denso 671-4234 Spark Plug Wire Set

Denso 671-4234 is a 7mm spark plug wire set built to match the form, fit, color, and performance of the original factory wire set. It is a direct OE-style ignition wire replacement for Subaru Impreza and Subaru Legacy applications, with construction that meets or exceeds OE/OES standards.

Key Features

• 7mm 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 design
• Female spark plug end terminal type
• Male distributor/coil end terminal type
• Built to match factory-installed wire set form, fit, color, and performance

Detailed Description

This Denso spark plug wire set is engineered for direct replacement on 1990-1996 Subaru Legacy and 1993-1996 Subaru Impreza models. The 7mm wire diameter supports OE-style routing, while the silicone boots help maintain a secure connection at the spark plug and ignition source. If you are replacing worn ignition wires on a Subaru Legacy or Subaru Impreza, Denso 671-4234 provides a factory-style solution that follows the original terminal layout and boot configuration.

This part cross-references NGK (e.g., FX31, FX55) for the same application.

What It Helps Address

• Engine misfire caused by worn or damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from inconsistent ignition transfer
• Voltage leakage from cracked or deteriorated wire insulation
• Poor terminal connection at the spark plug or coil/distributor end

Installation Notes and Tips

Verify wire routing against the original layout before removal, and transfer one wire at a time to reduce the chance of cross-connection. Confirm the 180-degree spark plug boot orientation and the female spark plug terminal type match your vehicle’s ignition setup. For Subaru Impreza and Subaru Legacy service, inspect plugs, cap, rotor, and coil components at the same time to avoid repeat ignition faults.

Quality Assurance

Denso First Time Fit ignition wire sets are built to OE/OES standards and are intended to match the original factory wire set in form and performance. Part number 671-4234 is a direct-fit ignition wire replacement for the listed Subaru applications.