Autolite 64 Spark Plug

Autolite 64 Copper Resistor Spark Plug

Autolite 64 is a copper resistor spark plug built for OE-style form, fit, and function across a wide range of import and domestic applications. It is specified with a 0.044 in. pre-gap, 14 mm thread diameter, 0.750 in. reach, flat seat, and stud terminal for straightforward replacement service.

The Autolite Copper Resistor Spark Plug line focuses on quick starts, smooth acceleration, and improved fuel economy in everyday driving. Part number 64 is a practical OE replacement choice for vehicles such as Hyundai Santa Fe, Kia Optima, and Toyota Pickup applications that call for a copper-core plug with resistor protection.

Key Features

• Copper center electrode core for reliable ignition performance
• Resistor design with 4000 resistance rating
• Nickel center and ground electrode tip materials
• Tapered ground electrode tip design with one ground electrode
• Ceramic insulator with mid-projection design
• Pre-gapped to 0.044 in. / 1.10 mm
• 14.0 mm thread diameter, 13/16 in. hex size, flat seat

Product Details

Autolite 64 is engineered as an OE-style spark plug for drivers who want a direct replacement that matches common factory specifications. The copper core supports consistent spark delivery, while the resistor construction helps reduce electrical noise in the ignition system. This makes it a solid service part for routine tune-ups on vehicles that specify a copper resistor spark plug.

This part cross-references Anchor 3000 and Dorman - HELP 80024 for the same application. It is also listed across many OE-style fitments, including 2001-2006 Hyundai Santa Fe, 2001-2004 Kia Optima, and 1980-1995 Toyota Pickup coverage, depending on engine specification and required gap.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Reduced throttle response during acceleration
• Misfire symptoms tied to aged ignition service parts
• Maintenance replacement for OE-style tune-up intervals

Installation Notes and Tips

Verify the vehicle’s required gap before installation. This plug is supplied with a 0.044 in. pre-gap, but several listed applications call for different gap settings, including 0.032 in., 0.035 in., 0.040 in., 0.042 in., 0.043 in., 0.050 in., and 0.028 in. depending on the engine and model year.

• Fits 2001-2006 Hyundai Santa Fe, N/A.
• Fits 2001-2004 Kia Optima, N/A.
• Fits 1999-2005 Hyundai Sonata, N/A.
• Fits 1980-1995 Toyota Pickup, N/A.
• Fits 1984-1989 Toyota Van, N/A.

Use the vehicle’s service specification for final gap setting and torque procedure. Confirm thread diameter, reach, seat type, and terminal style before installation to ensure proper OE-style fitment.

Quality Assurance

Autolite supplies ignition products for the automotive aftermarket and OE channels, with a product line focused on form, fit, and function replacement. Part number 64 is built to meet common service requirements for a broad range of vehicles that use a copper resistor spark plug.