Denso 3412 Spark Plug

Reliable Ignition Performance for Mazda Vehicles

The Denso Iridium Long Life 3412 spark plug is engineered to provide consistent ignition and durability for select Mazda models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine performance.

• Iridium center electrode tip for enhanced durability
• Platinum chip ground electrode tip design
• 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 of 16 suitable for Mazda engines
• Resistance rating of 5000 ohms to reduce electrical noise

About the Denso Iridium Long Life Product Line

The Iridium Long Life series by Denso focuses on delivering extended service life and stable ignition performance. Utilizing iridium and platinum materials in the electrode tips, these spark plugs are designed to withstand high temperatures and wear, making them suitable for vehicles requiring reliable secondary ignition components. The 3412 part number is part of this line, offering a balance of durability and efficient spark generation for Mazda models.

Technical Details and Specifications

This Denso 3412 spark plug features a copper core center electrode with an iridium tip, which enhances conductivity and wear resistance. The ground electrode incorporates a platinum chip tip and a nickel core, providing stable spark gaps and longevity. The flat seat design ensures proper sealing in the combustion chamber, while the 19 mm reach and 14 mm thread diameter match specific Mazda engine requirements. The resistance of 5000 ohms helps minimize electromagnetic interference with vehicle electronics.

Applications and Problem Solving

• Compatible with select Mazda models requiring part number 3412 spark plugs
• Addresses misfires caused by worn or damaged spark plugs
• Improves cold start performance and throttle response
• Reduces fouling and electrode wear in high-heat conditions
• Helps maintain fuel efficiency by ensuring consistent ignition

Installation Notes and Tips

When installing the Denso Iridium Long Life 3412 spark plug, ensure the engine is cool to prevent damage to the threads. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid over-tightening. Verify the pre-gap size of 1.1 mm before installation, although the spark plug comes pre-gapped. Proper installation will help maintain optimal engine performance and longevity.

Quality Assurance and Warranty

Denso manufactures the 3412 spark plug to meet strict quality standards, ensuring reliable ignition performance and durability. The use of iridium and platinum materials contributes to extended service life. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support customer confidence in fitment and function.