Denso 5346 Spark Plug

Overview of Denso Iridium Power Spark Plug 5346

The Denso Iridium Power spark plug 5346 is engineered for precision ignition performance in select Audi models. Designed to meet the specific requirements of vehicles like the Audi A8 Quattro and RS7, this spark plug offers reliable ignition and efficient combustion.

• 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
• Flat seat type with 14.00 mm thread diameter and 26.50 mm reach
• Pre-gap size of 0.8 mm and manufacturer heat range of 24
• Hex size of 16.0 mm for installation compatibility

Detailed Features and Specifications

The Denso Iridium Power 5346 spark plug incorporates a copper core center electrode with an iridium tip, which provides a balance of excellent conductivity and wear resistance. The ground electrode features a tapercut, u-groove design that enhances spark exposure and combustion efficiency. With a single ground electrode made from nickel, this spark plug maintains a standard ground configuration suitable for high-performance ignition systems. The flat seat ensures proper sealing in the combustion chamber, while the 14.00 mm thread diameter and 26.50 mm reach are designed to fit specific Audi engines precisely. The pre-gap size of 0.8 mm is factory set to optimize ignition timing and spark plug performance. The manufacturer heat range of 24 indicates its suitability for moderate to high engine temperatures.

About the Iridium Power Product Line

Denso's Iridium Power line focuses on delivering spark plugs with iridium-tipped center electrodes, which provide enhanced durability and consistent ignition performance. This product line is designed to improve throttle response and fuel efficiency while maintaining long service life. The 5346 spark plug is part of this line, offering the benefits of iridium technology tailored for secondary ignition systems in select Audi models.

Compatible Vehicles and Applications

• Compatible with Audi A8 Quattro
• Compatible with Audi RS7
• Compatible with Audi S6
• Compatible with Audi S8
• Compatible with Audi TT RS Quattro

This spark plug is intended for use in secondary ignition systems where precise spark delivery is critical for engine performance and emissions control.

Installation Notes and Tips

• Ensure the spark plug gap is set to 0.8 mm before installation if adjustment is necessary
• Use a 16.0 mm socket wrench for proper tightening
• Apply anti-seize compound sparingly on threads to prevent galling
• Torque to manufacturer specifications to avoid damage to the flat seat
• Inspect ignition coils and wiring for wear during replacement

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5346 spark plug to meet strict OEM standards for fit, form, and function. The use of high-quality materials such as iridium and copper ensures consistent performance and longevity. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.