NGK 4006 Spark Plug

NGK 4006 Standard Spark Plug Overview

NGK 4006 is a standard spark plug built around OE-style specifications for older domestic and import applications. It uses a copper center electrode core, nickel center and ground electrode tips, and a 5,000 ohm resistor for stable ignition performance in the vehicles listed below.

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s long OE supply background and focus on original-equipment-level fit and function. It is a practical choice for drivers servicing classic Chevrolet, Pontiac, Ford, Buick, GMC, Dodge, and Geo applications that call for this plug design.

Key Features

• NGK part number 4006, also identified as BPR5ES SOLID
• Standard spark plug design with a flat seat
• Copper center electrode core for dependable heat transfer
• Nickel center and ground electrode tip materials
• 5,000 ohm resistor for ignition system noise control
• Pre-gapped at .036 inches
• 14 mm thread diameter, 0.75 inch reach, 13/16 hex size
• Heat range 5 for OE-style service applications

Detailed Description

NGK 4006 is engineered for direct replacement use in a wide range of older vehicles that specify a standard spark plug with this thread, reach, seat, and gap configuration. The copper core supports consistent thermal conductivity, while the nickel electrode materials provide a familiar OE-style construction for routine ignition service. This plug is listed across applications such as 1961-1969 Chevrolet Impala, 1967-1969 Chevrolet Camaro, 1972-1979 Ford Courier, and 1982-1987 Buick Skyhawk, along with many other classic models.

This part cross-references AMS Automotive 4006 and AP Exhaust 7505 for the same application. If you are servicing a Chevrolet Nova, Pontiac Sunbird, or Ford Pinto and need NGK 4006, verify the required gap and engine specification before installation.

What This Spark Plug Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions tied to aged ignition components
• Reduced fuel economy from inefficient combustion
• Maintenance replacement for OE-style ignition service

Installation Notes and Tips

Confirm the specified gap for the vehicle before installation, since listed applications vary by model and year. The plug is pre-gapped at .036 inches, but some fitments call for different gap settings such as .035, .040, or .045 inches. Check thread diameter, reach, seat type, and hex size against the original plug to ensure proper fit. Use the correct torque procedure for the cylinder head material and inspect ignition wires or coils during service.

Quality Assurance

NGK is a major OE spark plug supplier in North America with decades of automotive manufacturing experience. The 4006 spark plug is built to OE-style standards for durability and consistent operation in the listed Chevrolet, Pontiac, Ford, Buick, GMC, Dodge, and Geo applications.

Compatible Vehicles

• Fits 1992-1994 Pontiac Sunbird, N/A
• Fits 1988-1990 Pontiac Sunbird, N/A
• Fits 1989 Geo Spectrum, N/A
• Fits 1988-1989 Pontiac Grand Am, N/A
• Fits 1988 Chevrolet Spectrum, N/A
• Fits 1988 Chevrolet Sprint, N/A
• Fits 1988 Pontiac Firefly, N/A
• Fits 1988 Pontiac Sunburst, N/A
• Fits 1982-1987 Buick Skyhawk, N/A
• Fits 1985-1987 Chevrolet Spectrum, N/A
• Fits 1985-1987 Chevrolet Sprint, N/A
• Fits 1985-1987 Pontiac Firefly, N/A
• Fits 1987 Pontiac Grand Am, N/A
• Fits 1986-1987 Pontiac Sunbird, N/A
• Fits 1985-1987 Pontiac Sunburst, N/A
• Fits 1982-1985 Chevrolet S10, N/A
• Fits 1982-1985 GMC S15, N/A
• Fits 1984-1985 Pontiac J2000 Sunbird, N/A
• Fits 1983-1984 Chevrolet S10 Blazer, N/A
• Fits 1983-1984 GMC S15 Jimmy, N/A
• Fits 1982-1983 Pontiac J2000, N/A
• Fits 1981 Ford Courier, N/A
• Fits 1972-1979 Ford Courier, N/A
• Fits 1975-1976 Ford Pinto, N/A
• Fits 1971-1973 Ford Pinto, N/A
• Fits 1966-1970 Chevrolet El Camino, N/A
• Fits 1970 Chevrolet Nova, N/A
• Fits 1961-1969 Chevrolet Bel Air, N/A
• Fits 1968-1969 Chevrolet C10 Suburban, N/A
• Fits 1968-1969 Chevrolet C20 Suburban, N/A
• Fits 1967-1969 Chevrolet Camaro, N/A
• Fits 1966-1969 Chevrolet Caprice, N/A
• Fits 1969 Chevrolet Corvette, N/A
• Fits 1961-1969 Chevrolet Impala, N/A
• Fits 1968-1969 Chevrolet K10 Suburban, N/A
• Fits 1966-1968 Chevrolet Corvette, N/A
• Fits 1966-1967 Chevrolet Malibu, N/A
• Fits 1967 Dodge Charger, N/A
• Fits 1961 Pontiac Parisienne, N/A