NGK 58404 Spark Plug Wire Set

NGK Spark Plug Wire Set for Land Rover

NGK Spark Plug Wire Set 58404 is a specific-fit ignition wire set built for select Land Rover Discovery and Range Rover applications. It uses blue silicone insulation, a 7.00 mm outside diameter, and noise suppression construction to support stable spark delivery and reduced electrical interference.

Key Features

• Specific-fit NGK ignition wire set for confirmed Land Rover applications
• Blue silicone insulation for heat resistance and durability
• 7.00 mm insulation outside diameter
• Noise suppression design to help reduce ignition interference
• SMag core material for consistent ignition performance
• NGK part number 58404, also identified as RC-EUX068

Product Details

NGK Spark Plug Wire Set 58404 is part of the NGK Spark Plug Wire Set line, a product family focused on OE-style ignition replacement parts for domestic and import vehicles. NGK draws on long-term OE experience and global manufacturing standards to produce ignition components that meet durability and operational performance expectations for everyday service use. This wire set is listed for 2000-2004 Land Rover Discovery and 1999-2002 Land Rover Range Rover, with an additional 1999 Land Rover Discovery application when equipped with a distributor. This part cross-references DENSO Auto Parts 671-8140 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark transfer
• Rough idle from inconsistent ignition delivery
• Electrical noise affecting ignition system operation
• Cracked or heat-aged wire insulation

Installation Notes and Tips

Verify engine configuration before ordering, especially for the 1999 Land Rover Discovery with distributor note. Match each wire to the correct cylinder routing and keep the leads separated from hot exhaust components and moving parts. Confirm the connector ends seat fully on the spark plugs and ignition components before starting the engine.

Quality Assurance

NGK is known for OE-focused ignition engineering and broad vehicle coverage across domestic and import applications. Part number 58404 is manufactured to support durability and consistent ignition performance in the listed Land Rover Discovery and Range Rover applications.