NGK 3878 Spark Plug Wire Set

NGK Spark Plug Wire Set for Hyundai and Kia

The NGK Spark Plug Wire Set, part number 3878, is a specific-fit ignition wire set built for select Hyundai and Kia applications. It uses silicone insulation, a blue outer jacket, and a magnetic variable-pitch core with noise suppression to support stable ignition performance and reduced electrical interference.

Key Features

• Specific-fit NGK Spark Plug Wire Set for confirmed vehicle applications
• Silicone insulation for heat resistance and durability
• Blue insulation color for easy visual identification
• Mag (Var. Pitch) core material with noise suppression
• Insulation outside diameter: 7.00
• NGK part number 3878 / RC-XX91

Product Details

NGK Spark Plug Wire Set 3878 is part of the NGK Spark Plug Wire Set line, which focuses on ignition components engineered to meet OE-level expectations for durability and operational performance. NGK draws on extensive ignition-system experience across domestic and import vehicles, and this wire set is built for direct replacement use on listed Hyundai Sonata, Hyundai Santa Fe, Hyundai Tiburon, Kia Magentis, and Kia Optima applications. This part cross-references DENSO Auto Parts 671-6220 for the same application.

What This Part Helps Address

• Engine misfire caused by worn or damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from inconsistent ignition transfer
• Electrical noise that can interfere with ignition performance
• Heat-related wire deterioration in aging ignition systems

Installation Notes and Tips

Verify the vehicle’s year, make, model, and engine application before installation. Route each wire to match the original layout and keep the wires separated from hot exhaust components and moving parts. For best results, inspect spark plugs, distributor components, and coil connections at the same time, since worn ignition parts can affect wire performance.

Quality Assurance

NGK is known for ignition components developed with broad OE experience and manufactured to support durability and consistent operation. This NGK Spark Plug Wire Set 3878 is built as a direct replacement part for the listed applications.

Vehicle Fitment

• Fits 2003-2008 Hyundai Tiburon, N/A
• Fits 2001-2006 Hyundai Santa Fe, N/A
• Fits 2001-2006 Kia Magentis, N/A
• Fits 2006 Kia Optima, N/A; except mid model year
• Fits 1999-2005 Hyundai Sonata, N/A
• Fits 2001-2005 Kia Optima, N/A