Autolite 5285 Spark Plug

Autolite Copper Resistor Spark Plug 5285

Autolite Copper Resistor Spark Plug 5285 is built for dependable ignition performance in a wide range of foreign and domestic vehicles. It uses a copper center electrode, nickel tip materials, and a 5,000-ohm resistor to support quick starts, smooth acceleration, and consistent fuel delivery.

As part of the Autolite Copper Spark Plugs line, this plug follows OE form, fit, and function expectations for drivers looking for a direct replacement spark plug at a value-focused price point. It is a practical choice for routine ignition service on applications such as Honda Civic and Toyota Corolla, where stable spark delivery matters.

Key Features

• Copper center electrode for reliable conductivity
• 5,000-ohm resistor type for reduced electrical noise
• Nickel center and ground electrode tip materials
• Tapered seat design with 14.0 mm thread diameter
• Pre-gapped to 0.044 in. / 1.10 mm
• Extra-long ceramic insulator for ignition system support
• Standard / regular center electrode design
• 16 mm hex size and stud terminal type

Product Details

Autolite 5285 is a copper resistor spark plug engineered with a tapered ground electrode tip design, single ground electrode, and 0.561 in. reach. The nickel-tipped electrode construction and ceramic insulator help maintain stable spark performance under normal operating conditions. This spark plug is a direct OE-style replacement for many makes and models, including Honda Civic and Toyota Corolla applications where the specified thread size, seat type, and gap match the vehicle requirements.

This part cross-references Monroe Shocks & Struts (e.g., WR11E0) for the same application.

Common Issues This Part Can Address

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

Installation Notes and Tips

Verify the vehicle’s required thread diameter, reach, seat type, and pre-gap before installation. Autolite 5285 uses a 14.0 mm thread, tapered seat, 0.561 in. reach, and 0.044 in. pre-gap, so it should be matched to the engine specification before service. Inspect the ignition coil, plug wires, and surrounding components during replacement to confirm the ignition system is in good condition. For Honda Civic and Toyota Corolla service, follow the manufacturer’s torque and service procedures.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, and this copper resistor spark plug is built to OE-style form, fit, and function standards. Part number 5285 is manufactured for consistent replacement performance across supported applications.