Denso 671-8140 Spark Plug Wire Set

Denso 671-8140 Ignition Wire Set

Denso 671-8140 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct replacement for select Land Rover Discovery and Range Rover applications, with OE-style construction for consistent ignition transfer.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing
• Silicone spark plug boot material for heat resistance and flexibility
• 150-degree spark plug end boot angle for proper terminal alignment
• Female spark plug end terminal type
• Male distributor coil end terminal type
• Built to meet or exceed OE/OES standards
• Direct-fit replacement for Land Rover Discovery and Range Rover applications

Product Details

The Denso First Time Fit line is engineered as an OE-style replacement line for drivers who want the original fit and performance profile without changing the vehicle’s ignition layout. Part number 671-8140 follows factory-style dimensions and terminal design, making it a practical choice for ignition service on 1999-2004 Land Rover Discovery and 1999-2002 Land Rover Range Rover models. This part cross-references NGK EUX066 and EUX068 for the same application.

For fitment-focused searches, this ignition wire set is a direct replacement for a 7mm Land Rover Discovery spark plug wire set and a 7mm Land Rover Range Rover ignition wire set. The silicone boot construction and OE-style terminal configuration support secure connection at the spark plug and coil/distributor ends.

Common Issues This Part Addresses

• Misfires caused by worn or heat-damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from deteriorated wire insulation or boot sealing
• Voltage leakage across aging ignition leads
• Intermittent ignition performance on older Land Rover Discovery and Range Rover models

Installation Notes and Tips

Verify engine layout and wire routing before removal so each lead returns to the correct cylinder and terminal location. Inspect coil, distributor, and spark plug terminals for corrosion or carbon tracking before installing the new set. Confirm the 150-degree spark plug boot orientation clears nearby components and follows the original routing path.

Quality Assurance

Denso First Time Fit ignition wire sets are manufactured to match OE-style specifications and are built to meet or exceed OE/OES standards. Part number 671-8140 is intended for direct replacement use on the listed Land Rover Discovery and Range Rover applications.