NGK 4644 Spark Plug

NGK V-Power Spark Plug Overview

The NGK V-Power Spark Plug 4644 is engineered for reliable ignition performance in select European vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion for models like the Audi S4, Porsche 911, and Aston Martin DB7.

• Resistance: 5000 ohms for optimal electrical performance
• Ground Electrode Tip and Configuration: Standard design with a single nickel ground electrode
• Center Electrode: Copper core with nickel tip for consistent spark delivery
• Pre-Gap Size: 0.036 inches for precise ignition timing
• Thread Diameter: 14.00 mm with 0.75 inch reach and flat seat type
• Hex Size: 5/8 inch for standard installation tools
• Electrical Terminal: Non-removable nut type for secure connection
• Manufacturer Heat Range: 7, suitable for moderate to high engine temperatures
• Insulator Height: 50.50 mm for proper fitment

About the V-Power Spark Plug Line

The NGK V-Power Spark Plug line focuses on delivering consistent ignition performance through quality materials and design. This line balances durability and electrical resistance to maintain engine efficiency and reduce misfires. The 4644 part number exemplifies these qualities with its copper core center electrode and nickel ground electrode, ensuring stable combustion in compatible vehicles.

Technical Details and Compatibility

This spark plug features a 5000 ohm resistance to suppress electrical noise and protect sensitive vehicle electronics. The single nickel ground electrode and copper core center electrode provide reliable spark generation. With a pre-gap of 0.036 inches and a heat range of 7, it is suited for engines requiring moderate heat dissipation. The flat seat and 14 mm thread diameter ensure proper sealing and fitment in engines like the Audi S6 and Aston Martin DB7.

Applications and Problem Solving

• Restores consistent ignition in Audi S4 and Porsche 911 engines
• Reduces misfires and rough idling in Aston Martin DB7
• Improves fuel efficiency by ensuring proper spark timing
• Prevents electrical interference with 5000 ohm resistance
• Maintains engine performance under moderate to high heat conditions

Installation Notes and Tips

When installing the NGK V-Power Spark Plug 4644, ensure the spark plug gap is set to the specified 0.036 inches if adjustment is needed. Use a 5/8 inch socket for proper torque application. The non-removable nut terminal requires compatible ignition wires. Verify the flat seat type matches the engine’s cylinder head design to avoid sealing issues. Always follow manufacturer torque specifications to prevent damage.

Quality Assurance and Warranty

NGK spark plugs undergo rigorous quality control to meet OEM standards. The V-Power Spark Plug 4644 is manufactured with high-grade copper and nickel materials to ensure durability and consistent performance. While specific warranty details vary by region, NGK typically offers coverage against manufacturing defects. Consult NGK or your vehicle’s service manual for warranty information related to this part number Bkr7e (4644).