Denso 3476 Spark Plug

Reliable Ignition Performance for Honda CR-Z

The Denso Iridium Long Life (SIP) spark plug, part number 3476, is engineered to provide consistent ignition performance specifically for the Honda CR-Z. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Iridium center electrode tip for enhanced durability
• Platinum needle ground electrode tip design
• Copper core materials for both center and ground electrodes
• Needle-to-needle ground configuration for precise spark delivery
• Pre-gap size of 1.3 mm optimized for ignition efficiency
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range rating of 20 for balanced thermal performance
• Resistance value of 5000 ohms to reduce electrical noise

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

The Iridium Long Life (SIP) product line from Denso focuses on delivering extended service life and stable ignition characteristics. Utilizing iridium for the center electrode tip and platinum for the ground electrode tip, these spark plugs are designed to withstand high temperatures and resist electrode wear. This combination supports the Honda CR-Z’s engine requirements by maintaining consistent spark quality over time.

Technical Details and Application

This spark plug features a copper core for both the center and ground electrodes, which enhances thermal conductivity and helps dissipate heat effectively. The needle-to-needle ground configuration with a platinum needle tip ensures precise spark formation, improving combustion efficiency. The 1.3 mm pre-gap size is calibrated to optimize ignition timing and fuel burn. With a flat seat and 19 mm reach, the Denso 3476 spark plug fits securely in the Honda CR-Z’s cylinder head, ensuring proper sealing and performance.

Common Issues Addressed by This Spark Plug

• Misfires or inconsistent engine starts in Honda CR-Z vehicles
• Reduced fuel efficiency due to incomplete combustion
• Engine hesitation or rough idling under load
• Excessive electrode wear leading to ignition failure
• Electrical interference affecting onboard electronics

Installation Notes and Tips

When installing the Denso 3476 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 specification to avoid over-tightening. Verify the pre-gap size of 1.3 mm before installation, as factory settings may vary. The 16 mm hex size allows for compatibility with common spark plug sockets. Regular inspection and replacement intervals should be followed according to Honda CR-Z maintenance guidelines.

Quality Assurance and Warranty

Denso spark plugs are manufactured to meet strict quality standards, ensuring reliable ignition performance and durability. The Iridium Long Life (SIP) spark plug line undergoes rigorous testing for heat resistance and electrode wear. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.