Autolite 985 Spark Plug

Autolite 985 Copper Resistor Spark Plug

Autolite 985 is a copper resistor spark plug built for OE-style fit, form, and function across a wide range of Chrysler, Dodge, and Jeep applications. It is engineered for quick starts, smooth acceleration, and improved fuel economy while maintaining the factory-style 0.035 in. gap used on many listed vehicles.

Key Features

• Copper center electrode core for reliable ignition performance
• Nickel center and ground electrode tip materials
• 4000 ohm resistor design for reduced electrical noise
• Pre-gapped to 0.034 in. / 0.90 mm
• Flat seat, 14 mm thread diameter, 0.750 in. reach
• Extra-long ceramic insulator for OE-style packaging
• 5/8 in. hex size with stud terminal connection

Product Details

The Autolite Copper Resistor Spark Plug line is positioned as an OE-style replacement option for foreign and domestic vehicles, and part number 985 follows that approach with standard plug geometry and a copper core for consistent spark delivery. The tapered ground electrode tip design and nickel electrode materials support stable ignition performance in everyday driving, including Chrysler Concorde, Dodge Intrepid, and Jeep Wrangler applications listed in the fitment data. This part cross-references Anchor 3001 and 3459 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Reduced throttle response during acceleration
• Ignition noise concerns in resistor-equipped systems
• Maintenance replacement for OE-style spark plug service intervals

Installation Notes

Verify the vehicle application before installation and confirm the specified gap for the engine. Autolite 985 is pre-gapped to 0.034 in. / 0.90 mm, which aligns closely with the 0.035 in. gap noted for many listed Dodge, Jeep, and Chrysler models. Check thread reach, seat type, and terminal style against the original plug before service. Compatible With 2004-2006 Dodge Ram 1500, N/A; 1992-2006 Dodge Viper, N/A; 1997-2006 Jeep TJ, N/A; 1997-2006 Jeep Wrangler, N/A; 1993-2004 Jeep Grand Cherokee, N/A; 1996-2002 Dodge Dakota, N/A; 1978-2001 Jeep Cherokee, N/A; and other listed Chrysler, Dodge, Plymouth, and Jeep applications.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, and this spark plug is built to OE-style specifications for fit and function. Part number 985 is manufactured to support dependable ignition performance in the listed applications, including Jeep Wrangler, Jeep Cherokee, and Dodge Viper fitments.