Denso 3356 Spark Plug

Reliable Ignition Performance for Hyundai, Jaguar, Kia, and Mitsubishi

The Denso Iridium Long Life spark plug 3356 is engineered to provide consistent ignition and enhanced durability for a range of vehicles including Hyundai Elantra, Kia Optima, and Mitsubishi Montero Sport. Designed with advanced materials, this spark plug supports efficient combustion and long-term engine reliability.

• Iridium center electrode tip for improved wear resistance
• Platinum chip ground electrode tip for stable ignition
• Copper core center electrode for optimal conductivity
• Standard ground configuration with nickel core ground electrode
• Pre-gap size of 1.1 mm for precise spark delivery
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16.0 mm for easy installation
• Manufacturer heat range rating of 16
• Resistance of 5000 ohms to reduce electrical noise

About the Denso Iridium Long Life Product Line

The Iridium Long Life line from Denso focuses on delivering extended durability and consistent ignition performance. Featuring iridium-tipped center electrodes, these spark plugs are designed to withstand high temperatures and resist electrode wear. The 3356 spark plug benefits from this technology, making it suitable for vehicles requiring reliable secondary ignition components over extended service intervals.

Technical Details and Application

The Denso 3356 spark plug incorporates a copper core center electrode with an iridium tip, enhancing electrical conductivity and durability. The ground electrode features a platinum chip tip and a nickel core, providing stable spark formation and resistance to electrode erosion. With a pre-gap size of 1.1 mm and a flat seat design, this spark plug ensures proper fit and optimal combustion in compatible engines. Its 14 mm thread diameter and 19 mm reach make it suitable for specific Hyundai, Jaguar, Kia, and Mitsubishi models.

Compatible Vehicles and Common Issues Addressed

• Compatible with Hyundai Elantra, Sonata, and Tiburon models
• Fits Kia Optima, Rondo, Sportage, and Spectra series
• Suitable for Mitsubishi Montero, Montero Sport, and Super V8
• Also compatible with Jaguar S-Type, XJ8, XJR, XK, XK8, XKR, and Vanden Plas
• Helps resolve misfires, rough idling, poor fuel economy, hard starts, and engine hesitation

Installation Notes and Tips

When installing the Denso 3356 spark plug, ensure the pre-gap is set to 1.1 mm if adjustment is necessary. Use a 16 mm socket for proper torque application and verify the flat seat matches the engine’s cylinder head design. Avoid over-tightening to prevent thread damage. It is recommended to replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Denso spark plugs undergo rigorous testing to meet OEM specifications for heat range, durability, and electrical resistance. The 3356 spark plug features a resistance rating of 5000 ohms to minimize radio frequency interference. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable ignition system performance.