NGK 5689 Spark Plug

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 5689 is engineered for reliable ignition performance in select Aston Martin, Saab, and Toyota vehicles, including models like the Saab 900, Toyota Supra, and Aston Martin Virage. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Iridium center electrode tip for enhanced durability and ignition
• Taper cut ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Standard ground configuration with a single nickel ground electrode
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.032 inches for precise spark gap
• Flat seat type with 14mm thread diameter and 0.75 inch reach
• Hex size of 5/8 inch for installation with common tools
• Manufacturer heat range rating of 6 for balanced thermal performance

Iridium IX Spark Plug Product Line Details

The Iridium IX Spark Plug line by NGK focuses on delivering consistent ignition with iridium-tipped electrodes that resist wear and maintain spark quality over time. This product line is designed to provide improved ignitability and longer service life compared to conventional spark plugs, making it suitable for performance-oriented and daily-driven vehicles alike.

Technical Description and Attributes

This NGK spark plug features a copper core center electrode with an iridium tip, combining excellent electrical conductivity with high durability. The taper cut ground electrode tip enhances spark exposure, contributing to more efficient combustion. The single nickel ground electrode and standard ground configuration support stable spark generation. With a pre-gap size of 0.032 inches and a flat seat design, the plug ensures proper fit and reliable ignition in compatible engines. The non-removable nut terminal type provides a secure electrical connection, while the 5/8 inch hex size allows for straightforward installation.

Applications and Problem Solving

• Restores consistent ignition in Aston Martin Virage, Saab 900, and Toyota Supra engines
• Reduces misfires caused by electrode wear or gap inconsistencies
• Improves cold start performance and throttle response
• Helps maintain fuel efficiency by ensuring complete combustion
• Addresses rough idling and engine hesitation related to spark plug degradation

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a 5/8 inch socket wrench for proper torque application
• Check and adjust the spark plug gap to 0.032 inches if necessary
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Ensure the spark plug is seated flat and tightened to the specified torque to avoid damage

Quality Assurance and Warranty

NGK spark plugs, including the Iridium IX Spark Plug 5689, are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, NGK products typically come with a limited warranty covering defects in materials and workmanship. Always consult the product documentation or vehicle manufacturer guidelines for warranty coverage and installation instructions.