Denso 3493 Spark Plug

Reliable Ignition Performance for Toyota Tacoma

The Denso Iridium Long Life spark plug 3493 is engineered to provide consistent ignition and durability for your Toyota Tacoma. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and long-term engine performance.

• Iridium center electrode tip for enhanced durability
• Platinum chip ground electrode tip for stable ignition
• Copper core center electrode for improved conductivity
• Standard ground configuration with nickel ground electrode core
• Pre-gap size of 1.1 mm for optimal spark gap
• Flat seat type with 14 mm thread diameter and 26.5 mm reach
• Hex size of 16.0 mm for easy installation
• Manufacturer heat range rating of 20

About the Denso Iridium Long Life Spark Plug Line

The Iridium Long Life product line from Denso focuses on delivering extended service intervals and reliable ignition performance. Featuring iridium-tipped center electrodes, these spark plugs are designed to resist wear and maintain consistent spark quality over time. The combination of iridium and platinum materials in the 3493 spark plug supports efficient combustion and helps reduce misfires in Toyota Tacoma engines.

Technical Details and Specifications

This Denso spark plug 3493 incorporates a copper core center electrode to enhance electrical conductivity, paired with an iridium tip that withstands high temperatures and erosion. The ground electrode features a platinum chip tip and a nickel core, providing a stable spark path and resistance to electrode wear. The flat seat design ensures proper sealing in the combustion chamber, while the 1.1 mm pre-gap size is optimized for ignition efficiency. With a thread diameter of 14 mm and a reach of 26.5 mm, this spark plug fits Toyota Tacoma engines requiring these dimensions.

Common Applications and Problem Solving

• Replacement for worn or fouled spark plugs in Toyota Tacoma
• Addressing engine misfires and rough idling
• Improving cold start performance and throttle response
• Reducing spark plug electrode wear and maintaining ignition stability
• Supporting fuel efficiency through consistent combustion

Installation Notes and Tips

When installing the Denso 3493 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 or under-tightening. Verify the pre-gap size of 1.1 mm before installation, although the spark plug comes pre-gapped. The 16 mm hex size allows for standard spark plug socket compatibility, facilitating straightforward replacement in Toyota Tacoma models.

Quality Assurance and Warranty

Denso manufactures the 3493 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 compared to conventional spark plugs. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support customer confidence in fitment and function.