Denso 5308 Spark Plug - Exhaust Side

Overview of Denso Iridium Power Spark Plug 5308

The Denso Iridium Power spark plug 5308 is engineered for reliable ignition performance in select Audi, BMW, Chevrolet, Fiat, Porsche, and Volkswagen vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Tapercut, u-groove ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 0.9 mm and flat seat type for proper fitment
• Heat range 22 suitable for specific engine requirements
• Thread diameter 12.00 mm and reach of 19.00 mm for precise installation
• Hex size 16.0 mm for standard tool compatibility
• Resistance rating of 5000 ohms to reduce electrical noise

Details on the Iridium Power Product Line

The Denso Iridium Power line focuses on delivering spark plugs with iridium-tipped electrodes that provide a balance of durability and performance. The iridium tip on the center electrode of the 5308 model enhances ignition reliability and longevity compared to conventional plugs. This product line is designed to meet the demands of modern engines requiring precise spark timing and efficient combustion.

Technical Description and Attributes

The Denso 5308 spark plug features a copper core center electrode that ensures excellent thermal conductivity, helping to maintain stable operating temperatures. The ground electrode uses nickel core material with a tapercut, u-groove tip design, which increases spark exposure and improves ignition efficiency. The single ground electrode configuration and a pre-gap size of 0.9 mm are optimized for the specified heat range 22, making it suitable for a range of vehicles including Audi A3 Quattro, BMW M5, Porsche 911, Volkswagen R32, and others. The flat seat type and 19.00 mm reach ensure proper sealing and fitment in compatible engines.

Compatible Vehicles and Applications

• Compatible with Audi models such as A3 Quattro and 500
• Fits BMW M5 and other select models
• Suitable for Chevrolet Spark and other Chevrolet vehicles
• Designed for Fiat 500 and similar models
• Compatible with Porsche 911 and Cayenne
• Fits Volkswagen R32, Touareg, TT Quattro, and Eos

Common Issues Addressed by Denso 5308 Spark Plug

• Misfiring or rough engine idle
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or lack of power during acceleration
• Excessive emissions from inefficient ignition

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.9 mm as specified. Use a 16 mm socket wrench for proper torque application. Ensure the flat seat type matches the engine’s cylinder head design to prevent leaks. Avoid over-tightening to protect the thread diameter of 12.00 mm and maintain proper reach of 19.00 mm. It is recommended to replace spark plugs in sets to maintain consistent engine performance.

Quality Assurance and Warranty

Denso spark plugs, including the Iridium Power 5308, are manufactured to meet OEM standards for fit, form, and function. The use of iridium and copper materials supports long service life and reliable ignition. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to ensure performance and durability in compatible Audi, BMW, Chevrolet, Fiat, Porsche, and Volkswagen vehicles.