Denso 3471 Spark Plug

Reliable Ignition Performance for Audi, Porsche, and Volkswagen

The Denso Iridium Long Life spark plug 3471 is engineered to deliver consistent ignition performance for select Audi, Porsche, and Volkswagen models. Designed with advanced materials and a multi-electrode configuration, this spark plug supports efficient combustion and engine reliability.

• Iridium center electrode tip for enhanced durability
• Multi-electrode ground configuration with three nickel core electrodes
• Platinum chip ground electrode tip for improved wear resistance
• 1.1 mm pre-gap size 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

Advanced Design Features of the Denso Iridium Long Life Spark Plug

The Denso Iridium Long Life spark plug 3471 incorporates a copper core center electrode with an iridium tip, providing a stable and long-lasting spark. The multi-electrode ground configuration includes three nickel core electrodes, each tipped with a platinum chip to resist electrode wear and maintain consistent spark quality over time. The 1.1 mm pre-gap size is calibrated to optimize ignition timing and combustion efficiency. This spark plug features a flat seat design with a 14 mm thread diameter and 19 mm reach, ensuring proper fitment and sealing in compatible engines.

The Iridium Long Life product line focuses on durability and extended service intervals by utilizing iridium and platinum materials in critical electrode areas. This combination reduces electrode erosion and supports reliable ignition performance under various driving conditions, making it suitable for high-performance and luxury vehicles.

Compatible Vehicles and Applications

This spark plug is compatible with a range of Audi, Porsche, and Volkswagen models, including:

• Audi A6 Quattro, A8 Quattro, S5, S6, S8
• Porsche 911
• Volkswagen Q7, Touareg

It is designed to address common ignition-related issues such as:

• Misfires and rough idling
• Reduced fuel efficiency
• Difficulty starting the engine
• Engine hesitation during acceleration
• Increased emissions due to incomplete combustion

Installation Notes and Tips

When installing the Denso Iridium Long Life spark plug 3471, ensure the engine is cool to prevent damage to the cylinder head. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid over-tightening or under-tightening. The 16.0 mm hex size allows for compatibility with standard spark plug sockets. Verify the pre-gap size of 1.1 mm before installation, although the plug typically comes pre-gapped.

Quality Assurance and Warranty

Denso manufactures the Iridium Long Life spark plug 3471 to meet strict quality standards, ensuring reliable ignition performance and durability. While specific warranty details are not provided, Denso products are generally backed by manufacturer quality controls and are designed for long service life in compatible Audi, Porsche, and Volkswagen vehicles.