Denso 3443 Spark Plug

Overview of Denso Iridium Long Life Spark Plug 3443

The Denso Iridium Long Life spark plug 3443 is engineered for reliable ignition performance in a wide range of vehicles including Acura, Honda, Nissan, and Subaru models. Designed with advanced materials, this spark plug supports efficient combustion and long service intervals.

• 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-gapped to 1.1 mm for optimal spark
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for easy installation
• Manufacturer heat range 16 suitable for various engine types

Detailed Features and Specifications

The Denso Iridium Long Life spark plug 3443 features an iridium center electrode tip, which provides a fine electrode for precise spark delivery and extended wear resistance. The copper core center electrode enhances thermal conductivity, helping to dissipate heat effectively. The ground electrode incorporates a platinum chip tip and a nickel core, combining durability with consistent spark performance. With a pre-gap size of 1.1 mm, this spark plug is optimized for efficient ignition timing and fuel combustion.

The flat seat design ensures a secure fit in compatible engines, while the 14 mm thread diameter and 19 mm reach accommodate a variety of vehicle applications. The hex size of 16 mm allows for straightforward installation using standard tools. This spark plug is designed with a resistance of 5000 ohms to reduce electrical noise and protect sensitive engine electronics.

Iridium Long Life Product Line

The Iridium Long Life line from Denso focuses on durability and consistent ignition performance. Utilizing iridium and platinum materials in critical electrode areas, this product line aims to extend spark plug life and maintain engine efficiency over time. The 3443 spark plug exemplifies these qualities, making it suitable for vehicles requiring reliable secondary ignition components.

Compatible Vehicles and Applications

This spark plug is compatible with a broad range of makes and models, including Acura, Audi, Chevrolet, Chrysler, Dodge, Geo, Honda, Hyundai, Isuzu, Kia, Mazda, Mitsubishi, Nissan, Porsche, Saab, Saturn, Subaru, Suzuki, and Volvo. Specific models include the Acura Integra, Honda Civic, Nissan 300ZX, Subaru Impreza, and Volvo S60 among others.

• Resolves misfires and rough idling issues
• Improves cold start performance
• Reduces engine hesitation during acceleration
• Helps maintain fuel efficiency
• Prevents spark plug fouling and wear

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 1.1 mm as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage. The 16 mm hex size allows for compatibility with common spark plug sockets. Ensure the flat seat type matches the engine’s cylinder head design for proper sealing.

Quality Assurance and Warranty

Denso manufactures the Iridium Long Life spark plug 3443 to meet OEM standards for fit, form, and function. The use of high-quality materials such as iridium and platinum contributes to consistent performance and longevity. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.