NGK 52391 Spark Plug Wire Set

NGK Spark Plug Wire Set for OE-Style Ignition Service

NGK Spark Plug Wire Set 52391 is a vehicle-specific ignition wire replacement built with silicone insulation, blue outer jackets, and noise suppression to support stable spark delivery. It is a direct-fit option for select Toyota Land Cruiser and Mercury Capri applications where accurate wire routing and dependable ignition performance matter.

Key Features

• Specific-fit spark plug wire set for confirmed vehicle applications
• Silicone insulation for heat resistance and durability
• Blue insulation color for easy visual identification
• Noise suppression type included to help reduce ignition interference
• SMag core material for consistent electrical performance
• 7.00 mm insulation outside diameter
• NGK part number 52391 / RC-FDX004

Product Details

NGK Spark Plug Wire Set 52391 is part of the NGK Spark Plug Wire Set line, a range focused on OE-level ignition service for domestic and import vehicles. NGK draws on decades of ignition-system experience and manufactures premium ignition components to meet original-equipment durability and operational standards. This wire set is built for specific applications, including 1978-1980 Toyota Land Cruiser and 1972-1974 Mercury Capri, with additional 1976 Mercury Capri coverage. If you are replacing worn ignition leads on a Toyota Land Cruiser or Mercury Capri, this NGK 52391 wire set provides a direct-fit service part for those listed vehicles.

This part cross-references DENSO Auto Parts 671-6002 and Dorman - Conduct-Tite 86413 for the same application.

Common Problems This Part Can Address

• Misfires caused by aged or damaged spark plug wires
• Hard starting related to weak or inconsistent spark delivery
• Ignition noise that can interfere with electrical system operation
• Cracked or heat-damaged wire insulation
• Rough idle from deteriorated ignition leads

Installation Notes and Tips

Verify the vehicle year, make, and model before installation. Route each lead to match the original layout and keep wires separated from hot exhaust components and moving parts. Confirm secure terminal engagement at the spark plug and ignition coil or distributor connection points. For best results, inspect related ignition components such as spark plugs and coil condition during service.

Quality Assurance

NGK is known for ignition components engineered to OE standards, with global manufacturing and distribution support for replacement parts used on domestic and import vehicles. Part number 52391 reflects NGK’s focus on durability, fit accuracy, and ignition performance for the listed applications.

Vehicle Fitment

• Fits 1978-1980 Toyota Land Cruiser, N/A
• Fits 1976 Mercury Capri, N/A
• Fits 1972-1974 Mercury Capri, N/A