Autolite 3923 Spark Plug

Autolite Copper Resistor Spark Plug Overview

The Autolite Copper Resistor Spark Plug 3923 is engineered to deliver reliable ignition performance for a wide range of vehicles including Acura, BMW, Toyota, and Volkswagen models. Designed with a copper core and resistor technology, this spark plug supports efficient combustion and reduces electrical interference.

• Resistance rating of 4000 ohms for noise suppression
• Tapered ground electrode tip made of nickel for durability
• Copper center electrode core with nickel tip for optimal conductivity
• Stud-type electrical terminal for secure connection
• Flat seat type with 0.750 inch reach and 14.0 mm thread diameter
• Pre-gapped at 0.044 inches (1.10 mm) for precise ignition
• Ceramic insulator with mid projection design for heat resistance
• Hex size 5/8 inch (16 mm) for easy installation

About the Copper Resistor Spark Plug Line

The Copper Resistor Spark Plug line from Autolite combines copper core technology with resistor features to reduce radio frequency interference while maintaining strong spark energy. This product line is designed to meet OEM specifications and provide consistent ignition performance across various vehicle makes and models. The 3923 spark plug is part of this line, offering a balance of durability and electrical efficiency suitable for secondary ignition systems.

Technical Details and Features

The Autolite 3923 spark plug features a copper core center electrode that enhances thermal conductivity, helping to dissipate heat effectively. The nickel ground electrode with a tapered tip design improves spark exposure and wear resistance. Its resistor type construction with a 4000 ohm resistance rating helps minimize electromagnetic interference that can affect vehicle electronics. The ceramic insulator with mid projection ensures proper heat range and electrical insulation. The spark plug’s flat seat and 0.750 inch reach make it compatible with a broad range of engines, including those found in Acura 4Runner, BMW 318i, and Toyota Camry models.

Applications and Problem Solving

• Restores consistent ignition in vehicles experiencing misfires
• Reduces radio frequency interference affecting onboard electronics
• Improves fuel efficiency by ensuring proper spark delivery
• Prevents electrode wear and extends spark plug service life
• Compatible replacement for worn or fouled spark plugs in specified models

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a torque wrench to tighten to manufacturer specifications to avoid damage
• Check and adjust the pre-gap if necessary, though the plug comes pre-gapped at 0.044 inches
• Inspect the spark plug hole for debris before installation
• Replace spark plugs in sets to maintain engine balance and performance

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. The Copper Resistor Spark Plug 3923 undergoes rigorous quality control to maintain consistent resistance and electrode integrity. While specific warranty details may vary, Autolite products typically come with a limited warranty against manufacturing defects.