NGK 4959 Spark Plug

Reliable Ignition with NGK Standard Spark Plug 4959

The NGK Standard Spark Plug 4959 is engineered to deliver consistent ignition performance for a variety of vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for stable electrical flow
• Special side ground electrode tip design for improved spark exposure
• Dual ground electrodes made of nickel for enhanced durability
• Copper center electrode core with nickel tip for optimal conductivity
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.036 inches for precise spark gap
• Flat seat type with 0.75 inch reach and 14 mm thread diameter
• Hex size of 5/8 inch for standard installation tools
• Manufacturer heat range of 6 suitable for moderate operating temperatures
• Insulator height of 50.50 mm for proper fitment

About the NGK Standard Spark Plug Line

The NGK Standard Spark Plug line is designed to meet OEM specifications for a wide range of vehicles, providing dependable ignition performance without specialized features. The Standard Spark Plug 4959 offers a balance of durability and efficiency, making it suitable for everyday driving conditions and routine maintenance.

Technical Details and Performance

This spark plug features a copper core center electrode with a nickel tip, which ensures effective heat dissipation and electrical conductivity. The special side ground electrode tip design enhances spark exposure, contributing to more complete combustion. With two nickel ground electrodes, the plug maintains consistent spark delivery and resists electrode wear. The 5000 ohm resistance helps reduce radio frequency interference, protecting vehicle electronics.

Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in compatible vehicles
• Reduces rough idling and hesitation during acceleration
• Helps maintain fuel efficiency by ensuring proper ignition timing
• Prevents spark plug fouling in moderate driving conditions

Installation Notes and Tips

When installing the NGK Standard Spark Plug 4959, ensure the spark plug gap is set to the specified 0.036 inches if adjustment is necessary. Use a 5/8 inch socket wrench for proper torque application. The flat seat and 0.75 inch reach are designed to fit specific engine configurations, so verify compatibility with your vehicle’s make and model before installation.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 4959 are not provided, NGK products typically come with manufacturer-backed quality assurance to support long-term use.