Denso 4701 Spark Plug

Overview of Denso Iridium TT Spark Plug 4701

The Denso Iridium TT spark plug 4701 is engineered for reliable ignition performance across a wide range of vehicles including Acura, BMW, Ford, Honda, Toyota, and Volkswagen models. Designed with advanced materials and a twin-tip ground electrode, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Platinum twin-tip ground electrode design for improved spark stability
• Copper core center electrode for optimal conductivity
• Flat seat type with 14mm thread diameter and 19mm reach
• Pre-gap size of 1.0 mm for precise spark gap
• Hex size of 16 mm for standard installation tools
• Manufacturer heat range rating of 16 for balanced thermal performance

Detailed Features and Specifications

The Denso Iridium TT 4701 spark plug features a copper core center electrode with an iridium tip, which provides a strong and consistent spark while maintaining electrode longevity. The ground electrode uses a nickel core with a platinum twin-tip design, enhancing spark exposure and reducing misfires. The twin-tip ground configuration improves ignition efficiency by creating a more stable spark path. With a resistance rating of 5000 ohms, this spark plug helps suppress electrical noise that can interfere with vehicle electronics.

The flat seat design ensures a secure fit in compatible engines, while the 14mm thread diameter and 19mm reach make it suitable for a variety of secondary ignition systems. The 1.0 mm pre-gap size is factory set to optimize combustion and reduce the need for adjustment during installation.

Iridium TT Brand Line Information

The Iridium TT line from Denso focuses on combining iridium and platinum electrode technologies to deliver improved ignition performance and durability. This product line is designed to provide a balance between long service life and efficient spark generation, making it suitable for modern vehicles requiring precise ignition components. The twin-tip ground electrode design is a key feature of the Iridium TT series, contributing to better ignitability and fuel efficiency.

Compatible Vehicles and Applications

• Compatible with Acura, Audi, BMW, Ford, Honda, Toyota, Volkswagen, and many other makes
• Suitable for models such as 4Runner, Accord, Camry, Civic, Jetta, and Passat
• Designed for use in secondary ignition systems requiring a 14mm thread diameter and 19mm reach spark plug

Common Issues Addressed by Denso Iridium TT 4701

• Engine misfires due to worn or inefficient spark plugs
• Reduced fuel efficiency caused by inconsistent ignition
• Difficulty starting the engine in cold or damp conditions
• Increased emissions from incomplete combustion
• Ignition system interference from electrical noise

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 for proper tightening to avoid damage to the spark plug or cylinder head. Ensure the spark plug threads are clean and free of debris to prevent cross-threading. It is recommended to replace spark plugs in sets to maintain consistent engine performance. Follow vehicle manufacturer torque specifications during installation.

Quality Assurance and Warranty

Denso manufactures the Iridium TT 4701 spark plug to meet OEM standards for fit, form, and function. The use of iridium and platinum materials ensures durability and resistance to electrode wear. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. Refer to the vehicle or part supplier for exact warranty terms.