Denso 4131 Spark Plug

Reliable Ignition Performance with Denso U-Groove Conventional Spark Plug 4131

The Denso U-Groove Conventional spark plug, part number 4131, is engineered to deliver consistent ignition performance for a variety of vehicle applications. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for optimal electrical performance
• Ground Electrode Tip Design: Standard for reliable spark delivery
• Ground Electrode Core Material: Nickel for durability
• Center Electrode Core Material: Copper to enhance conductivity
• Center Electrode Tip Material: Nickel for wear resistance
• Pre-Gap Size: 0.8 mm for precise spark gap
• Ground Electrode Quantity: Single electrode design
• Hex Size: 16.0 mm for standard installation tools
• Manufacturer Heat Range: 27 suitable for moderate engine temperatures
• Seat Type: Flat for secure sealing
• Reach: 19.00 mm thread length
• Thread Diameter: 14.00 mm compatible with many vehicle engines

About the U-Groove Conventional Product Line

The U-Groove Conventional line from Denso focuses on spark plugs with a unique U-shaped groove on the center electrode. This design improves ignitability and combustion efficiency by increasing the spark exposure area. The 4131 spark plug benefits from this technology, providing stable ignition and consistent engine performance in compatible vehicles.

Technical Details and Application

The Denso 4131 spark plug features a copper core center electrode that enhances thermal conductivity, helping to dissipate heat effectively. The nickel ground electrode and tip materials offer resistance to wear and corrosion, extending the service life of the plug. With a flat seat type and a 19 mm reach, this spark plug fits engines requiring these specific dimensions. The 5000 ohm resistance helps reduce radio frequency interference, ensuring smooth operation of vehicle electronics.

Common Uses and Problem Solving

• Restores proper ignition in engines experiencing misfires
• Improves fuel efficiency by ensuring complete combustion
• Reduces engine hesitation during acceleration
• Helps maintain stable idle and smooth engine performance
• Prevents fouling in engines compatible with nickel electrode spark plugs

Installation Notes and Tips

When installing the Denso 4131 spark plug, ensure the correct torque is applied to avoid damage to the flat seat and maintain proper sealing. Verify the pre-gap size of 0.8 mm before installation, adjusting if necessary to match vehicle manufacturer specifications. Use a 16 mm socket for installation and confirm thread compatibility with the engine’s 14 mm diameter threads. Proper installation will support optimal ignition and engine performance.

Quality Assurance and Warranty

Denso manufactures the 4131 spark plug to meet strict quality standards, ensuring reliable performance and durability. The materials and design are tested to withstand typical engine operating conditions. Warranty coverage details should be confirmed with the vehicle manufacturer or parts distributor, as Denso’s warranty policies may vary by region and application.