Autolite 124 Spark Plug

Autolite 124 Copper Resistor Spark Plug

Autolite 124 is a copper resistor spark plug built for OE-style ignition performance, quick starts, smooth acceleration, and steady fuel economy. It uses a copper center electrode, nickel tip materials, and a 5,000-ohm resistor to support consistent spark delivery in older Ford and Dodge applications.

Key Features

• Autolite Copper Resistor Spark Plug, part number 124
• Copper center electrode with nickel center and ground electrode tip materials
• 5,000-ohm resistor design for reduced electrical noise
• 0.037 in. pre-gap size and tapered seat type
• Standard/regular center electrode design with ceramic insulator
• 13/16 in. hex size, 18 mm thread diameter, 0.438 in. reach
• OE-style form, fit, and function for select Ford and Dodge engines

Product Details

The Autolite Copper Resistor Spark Plug line is built as an OE-style replacement for a wide range of domestic vehicles. Part number 124 uses a copper core for dependable conductivity, nickel electrode materials for durable spark transfer, and a short ceramic insulator for a conventional ignition setup. This configuration supports stable combustion and consistent engine response in applications such as Ford Bronco, Ford F-100, Ford F-250, Ford F-350, and Dodge Ram 3500 models listed in the fitment data.

This part cross-references Continental 5014 for the same application.

Common Issues This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Reduced throttle response during acceleration
• Misfire symptoms related to aged plug electrodes
• Electrical interference concerns in resistor-equipped ignition systems

Installation Notes and Fitment Tips

• Fits 1994 Dodge Ram 3500, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1987-1993 Dodge D250, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1987-1993 Dodge D350, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1987-1993 Dodge W250, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1987-1993 Dodge W350, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1987 Dodge D100, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1987 Dodge D150, N/A; Spark Plug OE style with a gap size of .035"/0.9mm; Copper Resistor Spark Plug
• Fits 1973-1977 Ford E-100 Econoline, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1975-1977 Ford E-100 Econoline Club Wagon, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1975-1977 Ford E-150 Econoline, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1975-1977 Ford E-150 Econoline Club Wagon, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1975-1977 Ford E-250 Econoline, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1977 Ford E-250 Econoline Club Wagon, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1975-1977 Ford E-350 Econoline, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1977 Ford E-350 Econoline Club Wagon, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1973-1977 Ford F-100, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1975-1977 Ford F-150, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1973-1977 Ford F-250, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1973-1977 Ford F-350, N/A; .030 Gap; Heavy Duty; OE Style; Copper Resistor Spark Plug
• Fits 1972 Ford E-100 Econoline, N/A; Copper Spark Plug
• Fits 1968-1971 Ford Bronco, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug
• Fits 1969-1971 Ford E-100 Econoline, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug
• Fits 1969-1971 Ford F-100, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug
• Fits 1960-1966 Ford F-100, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug
• Fits 1969-1971 Ford F-250, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug
• Fits 1960-1966 Ford F-250, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug
• Fits 1969 Ford E-100 Econoline, N/A; .030 Gap; Medium Duty; OE Style; Copper Resistor Spark Plug
• Fits 1965-1969 Ford F-100, N/A; .030 Gap; Medium Duty; OE Style; Copper Resistor Spark Plug
• Fits 1965-1969 Ford F-250, N/A; .030 Gap; Medium Duty; OE Style; Copper Resistor Spark Plug
• Fits 1965-1969 Ford F-350, N/A; .030 Gap; Medium Duty; OE Style; Copper Resistor Spark Plug
• Fits 1965-1967 Ford Econoline, N/A; .030 Gap; Medium Duty; OE Style; Copper Resistor Spark Plug
• Fits 1960-1966 Ford F-350, N/A; OE-style spark plug with a 0.030-inch gap.; Copper Resistor Spark Plug

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, and this spark plug follows OE form, fit, and function targets for the listed applications. Part number 124 is built for direct replacement use in select Ford and Dodge vehicles where the specified gap, reach, seat type, and resistor design match the engine requirements.