Denso 3484 Spark Plug

Reliable Ignition Performance for Lexus and Toyota Vehicles

The Denso Iridium Long Life (SIP) spark plug, part number 3484, is engineered to deliver consistent ignition performance for select Lexus and Toyota models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Iridium center electrode tip for enhanced durability and ignition
• Platinum needle ground electrode tip with needle-to-needle configuration
• Copper core center electrode for optimal conductivity
• Flat seat type with 14.00 mm thread diameter and 26.50 mm reach
• Pre-gap size of 0.8 mm for precise spark delivery
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range rating of 16 for balanced thermal performance

About the Denso Iridium Long Life (SIP) Spark Plug Line

The Iridium Long Life (SIP) product line from Denso focuses on extended durability and stable ignition characteristics. Utilizing iridium at the center electrode tip and a platinum needle design on the ground electrode, these spark plugs are built to maintain performance over longer service intervals. This line is suitable for vehicles requiring reliable secondary ignition components that withstand demanding operating conditions.

Technical Details and Compatibility

This spark plug features a nickel core ground electrode and a copper core center electrode, combining materials that optimize electrical conductivity and wear resistance. The needle-to-needle ground configuration improves spark efficiency, while the 0.8 mm pre-gap size ensures consistent ignition timing. The flat seat design and 14.00 mm thread diameter make it compatible with specific engine cylinder heads.

Compatible Lexus and Toyota Models

• Lexus ES300h
• Lexus NX300h
• Toyota Avalon
• Toyota Camry
• Toyota RAV4

Common Issues Addressed by Denso 3484 Spark Plug

• Engine misfires due to worn or inefficient spark plugs
• Reduced fuel efficiency from incomplete combustion
• Difficulty starting the engine in cold conditions
• Rough idling or hesitation during acceleration
• Increased emissions from poor ignition performance

Installation Notes and Tips

When installing the Denso 3484 spark plug, ensure the pre-gap size of 0.8 mm is maintained for optimal performance. Use a 16.0 mm socket wrench for proper torque application. Verify the flat seat type matches the engine cylinder head to prevent sealing issues. It is recommended to replace spark plugs in sets to maintain balanced engine operation.

Quality Assurance and Warranty

Denso manufactures the 3484 spark plug to meet strict quality standards, ensuring reliable ignition performance and durability. While specific warranty details may vary, Denso products typically come with manufacturer-backed coverage against defects in materials and workmanship.