Denso 3419 Spark Plug

Reliable Ignition Performance for Acura and Honda Vehicles

The Denso Iridium Long Life 3419 spark plug is engineered to provide consistent ignition and improved durability for select Acura and Honda models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and long-term engine reliability.

• Iridium center electrode tip for enhanced durability and stable spark
• Platinum chip ground electrode tip for improved wear resistance
• Thick nickel ground electrode core for robust performance
• Copper center electrode core for optimal conductivity
• Pre-gap size of 1.1 mm for precise ignition timing
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for standard installation tools
• Manufacturer heat range 22 suitable for specific Acura and Honda engines

About the Iridium Long Life Product Line

The Iridium Long Life line from Denso focuses on delivering extended service intervals and consistent ignition quality. Featuring iridium-tipped center electrodes, these spark plugs resist electrode wear and maintain stable spark performance over time. The 3419 part number is part of this line, combining iridium and platinum materials to balance durability and ignition efficiency for vehicles like the Acura NSX and Honda Civic.

Technical Details and Compatibility

The Denso 3419 spark plug is designed with a copper core center electrode to maximize electrical conductivity, paired with an iridium tip that withstands high temperatures and erosion. The ground electrode uses a platinum chip tip on a thick nickel core, enhancing wear resistance and spark stability. With a pre-gap size of 1.1 mm and a flat seat design, this spark plug ensures proper sealing and ignition timing. It is compatible with various Acura and Honda models, including the Civic, NSX, RSX, and S2000, making it a suitable replacement for secondary ignition system maintenance.

Common Applications and Issues Addressed

• Replacement for worn or fouled spark plugs in Acura and Honda secondary ignition systems
• Improves engine misfire and rough idle conditions
• Helps restore fuel efficiency by ensuring consistent spark delivery
• Reduces ignition-related starting difficulties
• Supports stable engine performance under varied driving conditions

Installation Notes and Tips

When installing the Denso 3419 spark plug, ensure the engine is cool to prevent thread damage. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications. Verify the pre-gap size of 1.1 mm before installation, adjusting if necessary. The 16 mm hex size allows for standard spark plug sockets. Proper installation will help maintain the spark plug’s performance and longevity.

Quality Assurance and Warranty

Denso manufactures the 3419 spark plug to meet strict quality standards, using premium materials such as iridium and platinum for durability. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable ignition system performance in compatible Acura and Honda vehicles.