Denso 671-8143 Spark Plug Wire Set

Reliable Spark Plug Wire Set for Lexus LS400 and SC400

The Denso 5mm Spark Plug Wire Set (Part Number 671-8143) is engineered to provide consistent ignition performance for Lexus LS400 and SC400 models. Designed with durable materials and precise specifications, this set ensures optimal electrical conductivity and engine efficiency.

• Spark plug boot material constructed from Sil PBT Sil for enhanced durability
• Distributor coil end terminal type: Male for secure connection
• Insulation outside diameter of 5.00 mm for effective electrical insulation
• Spark plug end boot angled at 105 degrees for improved fitment
• Spark plug end terminal type: Female for reliable spark plug connection
• Includes 8 angled spark plug end boots for complete replacement

About the Denso 5mm Brand Line

The Denso 5mm brand line focuses on ignition wire sets with a 5.00 mm insulation diameter, balancing flexibility and durability. This line is designed to meet the specific ignition requirements of vehicles like the Lexus LS400 and SC400, providing consistent spark delivery and resistance to heat and wear.

Detailed Product Description

This spark plug wire set features Sil PBT Sil boot material, which offers resistance to heat and chemical exposure, extending the lifespan of the wires. The male distributor coil end terminals ensure a secure and stable connection to the ignition coil, while the female spark plug end terminals provide a tight fit on the spark plugs. The 105-degree angled spark plug boots facilitate easier installation in tight engine compartments, especially in the Lexus LS400 and SC400 engine bays. With an insulation diameter of 5.00 mm, these wires maintain effective electrical insulation to prevent misfires and signal loss.

Common Applications and Issues Addressed

• Replacement of worn or damaged spark plug wires in Lexus LS400 and SC400
• Resolving engine misfires caused by faulty ignition wires
• Improving ignition system reliability and spark delivery
• Reducing electrical interference and signal loss in ignition circuits
• Addressing poor engine performance related to ignition wire degradation

Installation Notes and Tips

When installing the Denso 671-8143 spark plug wire set, ensure that the male distributor coil end terminals are properly seated to avoid loose connections. The 105-degree angled spark plug boots should be aligned carefully to fit the spark plugs without bending or stressing the wires. It is recommended to replace all wires simultaneously to maintain balanced ignition performance. Verify wire routing to prevent contact with hot engine components or moving parts.

Quality Assurance and Warranty

Denso manufactures this spark plug wire set to meet OEM specifications for Lexus LS400 and SC400 models. The use of high-quality Sil PBT Sil materials and precise terminal construction supports long-term durability and consistent performance. While specific warranty details are not provided, Denso products typically adhere to strict quality control standards to ensure reliability in automotive ignition systems.