Denso 5311 Spark Plug

Overview of Denso Iridium Power Spark Plug 5311

The Denso Iridium Power spark plug 5311 is engineered for reliable ignition performance in select Audi, Porsche, and Volkswagen models. Designed with advanced materials and precise specifications, it supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability
• Tapercut, u-groove ground electrode tip design
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 0.8 mm and flat seat type
• Thread diameter of 14.00 mm and reach of 19.00 mm
• Hex size of 16.0 mm for installation
• Manufacturer heat range rating of 24
• Resistance value of 5000 ohms

Detailed Features and Specifications

The Denso Iridium Power 5311 spark plug incorporates a fine iridium tip on the center electrode, which improves ignition reliability and extends service life compared to conventional plugs. The copper core center electrode enhances thermal conductivity, helping maintain stable combustion temperatures. The ground electrode features a tapercut u-groove design with a nickel core, which supports consistent spark formation and reduces electrode wear. With a pre-gap size of 0.8 mm and a flat seat, this spark plug ensures proper sealing and optimal spark gap for efficient ignition. The 14 mm thread diameter and 19 mm reach make it compatible with specific engine designs in Audi A6 Quattro, A7 Quattro, A8 Quattro, Porsche Cayenne, Panamera, and Volkswagen Q5, Q7, S4, S5, SQ5, and Touareg models.

About the Iridium Power Product Line

The Iridium Power line by Denso focuses on delivering spark plugs with iridium-tipped electrodes that provide improved ignition performance and longer durability. This product line is designed to meet the demands of modern engines requiring precise spark timing and efficient combustion. The 5311 spark plug benefits from this technology, offering a balance of performance and longevity suitable for high-end European vehicles.

Compatible Vehicles and Applications

• Compatible with Audi A6 Quattro, A7 Quattro, and A8 Quattro
• Suitable for Porsche Cayenne and Panamera models
• Fits Volkswagen Q5, Q7, S4, S5, SQ5, and Touareg
• Ideal for secondary ignition system replacement or upgrade
• Addresses ignition misfires, rough idling, and poor fuel efficiency

Installation Notes and Tips

When installing the Denso Iridium Power 5311 spark plug, ensure the correct torque is applied to avoid damage to the threads or improper sealing. The 16 mm hex size allows for standard spark plug socket use. Verify the pre-gap size of 0.8 mm before installation, adjusting if necessary to match manufacturer specifications. Use anti-seize compound sparingly on the threads if recommended by the vehicle manufacturer. Always replace spark plugs in sets to maintain consistent engine performance.

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5311 spark plug to meet strict quality standards, ensuring reliable performance and durability. The use of premium materials such as iridium and copper contributes to extended service life. While specific warranty details may vary, Denso products typically come with manufacturer-backed warranties covering defects in materials and workmanship.