Denso 4707 Spark Plug

Reliable Ignition Performance for Acura, Toyota, and More

The Denso Iridium TT spark plug 4707 delivers consistent ignition and efficient combustion for a wide range of vehicles including Acura, Toyota, Honda, and Volkswagen models. Designed with advanced materials and a twin-tip ground electrode, this spark plug supports smooth engine operation and improved fuel efficiency.

• Iridium center electrode tip for enhanced durability and precise ignition
• Platinum twin-tip ground electrode design for stable spark and longer life
• Copper core center electrode for optimal conductivity
• Flat seat type with 14mm thread diameter and 19mm reach for secure fitment
• Pre-gap size of 1.0 mm for accurate spark gap
• Hex size of 16 mm for easy installation
• Manufacturer heat range rating of 20 suitable for various driving conditions

About the Denso Iridium TT Spark Plug Line

The Iridium TT line from Denso features twin-tip ground electrodes combining iridium and platinum materials to improve ignition stability and electrode longevity. This design reduces voltage requirements and enhances combustion efficiency, making it suitable for secondary ignition systems in many passenger vehicles. The 4707 part number represents a specific configuration optimized for compatibility with multiple makes and models.

Technical Details and Compatibility

The Denso 4707 spark plug incorporates a nickel ground electrode core with a platinum twin-tip design, paired with a copper core center electrode tipped with iridium. This combination balances durability and electrical conductivity. The single ground electrode with a 1.0 mm pre-gap ensures consistent spark delivery. With a flat seat and 19 mm reach, it fits securely in engines requiring these specifications. Compatible vehicles include Acura Integra and CL500, Toyota Camry and Supra, Honda Civic and CRX, Volkswagen Golf and Passat, and many others across brands like Audi, Lexus, Nissan, and Mercedes-Benz.

Common Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in Acura and Toyota vehicles
• Enhances fuel efficiency by ensuring complete combustion
• Reduces ignition voltage demand for smoother engine operation
• Extends service intervals compared to conventional spark plugs

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 1.0 mm as specified. Use a 16 mm socket wrench to tighten the spark plug to the manufacturer’s torque specifications to avoid damage. The flat seat design requires proper seating to prevent compression leaks. It is recommended to replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Denso spark plugs, including the Iridium TT 4707, are manufactured to meet OEM standards for fit, form, and function. The use of iridium and platinum materials ensures resistance to electrode wear and corrosion. While specific warranty terms may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.