Denso 5377 Spark Plug

Reliable Ignition Performance with Denso Iridium Power Spark Plug 5377

The Denso Iridium Power spark plug 5377 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
• Pre-gap size of 0.9 mm for precise spark gap
• Flat seat type with 19.00 mm reach and 12.00 mm thread diameter
• Hex size of 18.0 mm for standard installation tools
• Manufacturer heat range rating of 27 for balanced thermal performance
• Resistance rating of 5000 ohms to reduce electrical noise

About the Denso Iridium Power Product Line

The Iridium Power line from Denso focuses on delivering spark plugs with iridium-tipped electrodes that provide a fine spark for improved combustion. This product line is designed to enhance throttle response and fuel efficiency while maintaining long service life. The 5377 spark plug benefits from these features, making it suitable for drivers seeking reliable secondary ignition components.

Technical Details and Application

The Denso 5377 spark plug features a copper core center electrode with an iridium tip, combining excellent conductivity with wear resistance. The tapercut, u-groove ground electrode tip design improves spark exposure, which can contribute to more complete fuel combustion. With a flat seat and a reach of 19.00 mm, this spark plug fits applications requiring these specific dimensions. The resistance of 5000 ohms helps minimize electromagnetic interference, supporting stable engine electronics.

Common Uses and Problem Solving

• Restores consistent ignition in engines experiencing misfires
• Improves throttle response and fuel efficiency in compatible vehicles
• Reduces spark plug fouling due to precise electrode design
• Supports stable engine performance under varied operating conditions
• Helps maintain proper combustion in engines requiring a heat range of 27

Installation Notes and Tips

Ensure the spark plug gap is set to the specified 0.9 mm pre-gap before installation. Use an 18 mm socket wrench for proper tightening. Verify compatibility with your vehicle’s make and model, focusing on thread diameter (12.00 mm) and reach (19.00 mm) to avoid fitment issues. Avoid over-tightening to prevent damage to the flat seat.

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5377 spark plug to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details are not provided, Denso products typically come with manufacturer-backed quality assurance to support customer confidence in their ignition components.