Denso 671-4246 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set for Subaru

Denso 671-4246 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 replacement for Subaru ignition service where consistent spark delivery and correct terminal fit are required.

The Denso 7mm product line focuses on factory-style replacement parts for ignition service, and this wire set follows that approach with OE/OES-level construction standards. It is a practical choice for Subaru Baja, Forester, Impreza, Legacy, and Outback applications that call for a 7mm ignition wire set.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing
• Sil PBT Sil spark plug boot material for heat and electrical insulation support
• 90-degree spark plug end boot for tight engine bay routing
• Female spark plug end terminal type
• Female distributor/coil end terminal type
• Built to match factory-installed wire set form, fit, color, and performance
• Constructed to meet or exceed OE/OES standards

Detailed Description

This Denso spark plug wire set, part number 671-4246, is engineered for Subaru ignition systems that use a 7mm wire design. It is listed for 2003-2006 Subaru Baja, 1999-2004 Subaru Forester, 1999-2004 Subaru Impreza, 1999-2003 Subaru Legacy, 2000-2003 Subaru Outback, and 2004 Subaru Legacy and Outback models except California applications. The fitment data also supports long-tail searches such as Subaru Forester 7mm spark plug wire set and Subaru Impreza ignition wire replacement.

With female terminals at both ends and a 90-degree spark plug boot, this set is built for proper connection at the coil/distributor side and at the spark plug side. The Denso 7mm construction is intended to preserve the original routing and connection style used on the vehicle, which helps maintain consistent ignition performance during routine maintenance or wire replacement.

This part cross-references NGK FX58 and Bosch 09479 for the same application.

What It Helps Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark transfer
• Rough idle from deteriorated wire insulation or terminal wear
• Intermittent ignition performance from poor terminal contact
• Voltage leakage from aging plug wire insulation

Installation Notes and Tips

• Verify engine application and model year before ordering, especially for 2004 Subaru Legacy and 2004 Subaru Outback except California fitment.
• Match each wire to the original routing to avoid crossfire and heat exposure.
• Inspect spark plugs, coil/distributor terminals, and wire retainers before installation.
• Confirm the female terminal ends seat fully at both the spark plug and coil/distributor connections.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to OE-style form and performance expectations, with construction that meets or exceeds OE/OES standards. Part number 671-4246 is a factory-style replacement option for Subaru ignition service.