Denso 3143 Spark Plug

Reliable Ignition Performance for Acura, Honda, and More

The Denso 3143 spark plug from the U-Groove Conventional line delivers consistent ignition performance for a wide range of vehicles including Acura, Honda, Nissan, and Mercedes-Benz models. 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
• Center Electrode Core Material: Copper for excellent conductivity
• Ground Electrode Core Material: Nickel for durability
• Pre-Gap Size: 1.1 mm for precise ignition timing
• Thread Diameter: 14.00 mm and Reach: 19.00 mm for proper fitment
• Hex Size: 16.0 mm for easy installation
• Manufacturer Heat Range: 16 suitable for various engine conditions
• Seat Type: Flat ensuring secure seating in the cylinder head

About the Denso U-Groove Conventional Spark Plug Line

The U-Groove Conventional spark plug line by Denso is engineered to provide dependable ignition with a focus on conventional electrode designs. Featuring a U-shaped groove in the center electrode tip, these plugs enhance spark exposure to the air-fuel mixture, promoting stable combustion. The 3143 model maintains this design philosophy with standard ground electrode configuration and quality materials like copper and nickel, balancing performance and longevity.

Technical Details and Compatibility

The Denso 3143 spark plug is compatible with a variety of makes and models such as the Acura TL, Honda Civic, Nissan Maxima, Mercedes-Benz C320, and Hyundai Elantra. Its 14 mm thread diameter and 19 mm reach ensure proper installation in engines requiring these specifications. The 5000 ohm resistance helps reduce electromagnetic interference, protecting vehicle electronics while maintaining ignition efficiency.

Common Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in Acura and Honda vehicles
• Reduces rough idling and hesitation in Nissan and Hyundai engines
• Maintains consistent spark delivery for Mercedes-Benz and Land Rover models
• Supports fuel efficiency by ensuring complete combustion

Installation Notes and Tips

• Verify thread size and reach match your vehicle’s specifications before installation
• Use a torque wrench to tighten to manufacturer recommended torque to avoid damage
• Check and adjust the pre-gap if necessary to 1.1 mm for optimal performance
• Inspect the spark plug seat type to ensure compatibility with the cylinder head
• Replace spark plugs in sets to maintain balanced engine operation

Quality Assurance and Warranty

Denso spark plugs, including the 3143 model, are manufactured to meet strict quality standards for durability and performance. The use of copper and nickel materials in the electrodes ensures resistance to wear and corrosion. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable ignition system operation.