Denso 5344 Spark Plug

Overview of Denso Iridium Power Spark Plug 5344

The Denso Iridium Power spark plug 5344 is engineered for reliable ignition performance across a wide range of vehicles including Acura, BMW, Ford, Honda, Toyota, and more. 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 1.1 mm and flat seat type for proper fitment
• Thread diameter of 14.00 mm and reach of 26.50 mm
• Hex size of 16.0 mm for installation with common tools
• Manufacturer heat range rating of 20
• Resistance of 5000 ohms to reduce radio frequency interference

Detailed Product Features and Specifications

The Denso Iridium Power 5344 spark plug features a fine iridium tip on the center electrode, which provides a stable and efficient spark for improved combustion. The copper core center electrode enhances thermal conductivity, helping to dissipate heat effectively. The ground electrode uses a tapercut, u-groove design with a nickel core, which increases spark exposure and contributes to better ignition performance. With a pre-gap size of 1.1 mm and a flat seat type, this spark plug ensures proper sealing and fitment in compatible engines.

Its thread diameter of 14.00 mm and reach of 26.50 mm make it suitable for a variety of vehicles, including models like the Toyota Camry, Ford F-150, Honda Civic, BMW 328i, and Subaru WRX. The 16.0 mm hex size allows for easy installation using standard spark plug sockets. Additionally, the 5000 ohm resistance helps minimize electrical noise that can interfere with vehicle electronics.

Iridium Power Product Line Information

The Denso Iridium Power line is designed to provide enhanced ignition performance through the use of iridium-tipped electrodes. This product line focuses on delivering reliable spark and improved fuel efficiency by combining iridium's durability with copper's conductivity. The 5344 spark plug is part of this line, offering a balance of longevity and consistent ignition for secondary ignition systems.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in Acura, BMW, Ford, Honda, Toyota, and other compatible vehicles
• Helps resolve engine misfires and rough idling caused by degraded spark plugs
• Improves cold start performance and throttle response
• Reduces radio frequency interference affecting vehicle electronics
• Supports efficient fuel combustion to maintain engine power and emissions standards

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Check and adjust the spark plug gap if necessary, maintaining the 1.1 mm pre-gap size
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Inspect ignition wires or coils during installation for optimal performance

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5344 spark plug to meet strict quality standards, ensuring consistent performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. Always consult the product documentation or vehicle manufacturer guidelines for warranty coverage and installation instructions.