NGK 4589 Spark Plug

Reliable Ignition Performance for Lexus, Toyota, and More

The NGK Laser Iridium Spark Plug 4589 is engineered to deliver consistent ignition and efficient combustion for a wide range of vehicles including Lexus, Toyota, Mazda, Pontiac, and Scion models. Designed with durable iridium and copper materials, this spark plug supports optimal engine performance and longevity.

• Iridium center electrode tip for enhanced durability and precise ignition
• Copper core center electrode for improved conductivity
• Standard ground electrode design with nickel core material
• Pre-gapped to .044 inches for accurate spark delivery
• Non-removable nut electrical terminal type for secure connection
• Flat seat type with 14mm thread diameter and .75 inch reach
• Hex size of 5/8 inch for easy installation
• Manufacturer heat range of 6 suitable for various engine conditions

About the NGK Laser Iridium Spark Plug Line

The Laser Iridium Spark Plug line from NGK combines advanced iridium technology with precise manufacturing to provide reliable ignition and extended service life. The iridium tip on the center electrode offers a fine electrode design that requires less voltage to generate a strong spark, improving fuel efficiency and reducing misfires. This line is designed to meet the demands of modern engines, including those found in Lexus and Toyota vehicles.

Technical Details and Compatibility

This NGK spark plug, part number 4589 (Ifr6t11), features a single ground electrode with a nickel core, ensuring durability under high temperatures. The copper core center electrode enhances electrical conductivity, while the non-removable nut terminal type ensures a stable electrical connection. With a pre-gap size of .044 inches and a flat seat design, it fits securely in compatible engines. The spark plug is compatible with a variety of models such as the Lexus RX330, Toyota Camry, Mazda Miata, Pontiac Vibe, and Scion tC, among others.

Common Applications and Problem Solving

• Restores engine misfire issues caused by worn or damaged spark plugs
• Improves fuel efficiency by providing consistent spark ignition
• Reduces rough idling and hesitation during acceleration
• Supports smooth engine start-up in cold or hot conditions
• Helps maintain optimal engine performance in daily driving and highway use

Installation Notes and Tips

When installing the NGK Laser Iridium Spark Plug 4589, ensure the spark plug gap is set to the factory specification of .044 inches if adjustment is necessary. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or seat. The 5/8 inch hex size allows for standard spark plug socket compatibility. Always inspect the ignition system components for wear or damage during replacement.

Quality Assurance and Warranty

NGK spark plugs are manufactured to strict quality standards to ensure reliable performance and durability. The Laser Iridium Spark Plug 4589 undergoes rigorous testing for heat resistance and electrical conductivity. While specific warranty details may vary, NGK products typically come with a limited warranty covering manufacturing defects.