Denso 5379 Spark Plug

Reliable Ignition Performance with Denso Iridium Power Spark Plug 5379

The Denso Iridium Power spark plug 5379 is engineered to deliver consistent ignition and improved combustion efficiency. Designed with advanced materials and precise specifications, this spark plug supports optimal engine performance for various vehicle makes and models.

• Iridium center electrode tip for enhanced durability and ignition
• Tapercut, u-groove ground electrode tip design for better spark exposure
• Copper core center electrode for efficient heat dissipation
• Nickel ground electrode core material with standard ground configuration
• Flat seat type with 14.00 mm thread diameter and 12.70 mm reach
• Pre-gap size of 0.8 mm and manufacturer heat range of 22
• Hex size of 20.6 mm for standard installation tools
• Resistance rating of 5000 ohms to reduce electrical noise interference

Detailed Features and Specifications

The Denso Iridium Power 5379 spark plug incorporates a copper core center electrode with an iridium tip, which provides a balance of excellent conductivity and long-lasting wear resistance. The ground electrode features a tapercut, u-groove design that improves spark exposure and combustion efficiency. With a single ground electrode made from nickel, this spark plug maintains a standard ground configuration suitable for many ignition systems. The flat seat type ensures a secure fit in compatible cylinder heads, while the 14.00 mm thread diameter and 12.70 mm reach accommodate specific engine designs. The pre-gap size of 0.8 mm is optimized for reliable ignition, and the manufacturer heat range of 22 supports stable operation under various driving conditions. Additionally, the 5000 ohm resistance rating helps minimize radio frequency interference, protecting sensitive electronic components.

About the Denso Iridium Power Product Line

The Iridium Power line from Denso focuses on delivering spark plugs with iridium-tipped electrodes that enhance ignition performance and durability. This product line is designed to provide improved throttle response and better fuel efficiency compared to conventional spark plugs. The 5379 model benefits from these advancements, making it suitable for drivers seeking reliable secondary ignition components that meet OEM specifications.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs causing misfires
• Improves engine start-up reliability in cold or humid conditions
• Reduces engine hesitation and rough idling
• Helps maintain fuel efficiency by ensuring complete combustion
• Minimizes ignition system electrical noise affecting vehicle electronics

Installation Notes and Tips

Ensure the spark plug gap is set to 0.8 mm before installation if not pre-gapped. Use a 20.6 mm socket wrench for proper tightening torque to avoid damage to the electrode or cylinder head. Verify compatibility with your vehicle’s make and model by cross-referencing the part number 5379. Avoid over-tightening to maintain the flat seat integrity and prevent thread damage.

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5379 spark plug to meet strict quality standards, ensuring consistent performance and durability. While specific warranty details may vary by distributor, Denso products typically come with a limited warranty covering defects in materials and workmanship. Consult your vehicle’s service manual and local regulations for proper maintenance intervals and replacement guidelines.