Autolite XP3923 Spark Plug

Autolite Iridium Spark Plug XP3923 Overview

The Autolite Iridium Spark Plug XP3923 is engineered for reliable ignition performance across a wide range of vehicles including Acura, BMW, Toyota, and Volkswagen models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Taper cut ground electrode with platinum tip for improved spark efficiency
• Copper core center electrode for optimal conductivity
• Resistor type with 4000 ohm resistance to reduce electrical noise
• Metric thread size M14 x 1.25 with 0.75 inch reach
• Flat seat type with included washer for secure installation
• Ceramic insulator with 2.007 inch height for heat resistance
• Non-removable nut electrical terminal for stable connection

Iridium Spark Plug Brand Line Details

The Autolite Iridium Spark Plug line focuses on performance and longevity by utilizing iridium-tipped center electrodes combined with copper cores. This design enhances ignition reliability and fuel efficiency while maintaining resistance to electrode wear. The XP3923 model benefits from this technology, making it suitable for performance-oriented applications and a variety of passenger vehicles.

Technical Description and Features

The XP3923 spark plug features a fine wire iridium center electrode that provides a strong and consistent spark, essential for efficient combustion. The taper cut ground electrode with a platinum tip reduces electrode wear and improves spark exposure. The copper core center electrode ensures excellent electrical conductivity, while the ceramic insulator withstands high temperatures and prevents misfires. With a manufacturer heat range of 10 and a pre-gap size of 0.044 inches (1.1 mm), this spark plug is optimized for mid-projection combustion chambers. The resistor type design with 4000 ohms resistance helps minimize radio frequency interference, supporting modern vehicle electronics.

Compatible Vehicles and Applications

• Compatible with Acura, BMW, Toyota, Volkswagen, and many other makes
• Suitable for models such as 4Runner, 318i, A4 Quattro, Camry, and Golf
• Designed for use in performance and daily driving conditions
• Ideal for vehicles requiring M14 x 1.25 thread size and 0.75 inch reach spark plugs

Installation Notes and Tips

• Ensure the spark plug gap is set to 0.044 inches (1.1 mm) before installation
• Use a 5/8 inch hex socket for proper torque application
• Confirm flat seat compatibility with your engine’s cylinder head
• Hand-tighten initially to avoid cross-threading, then torque to manufacturer specifications
• Replace spark plugs in sets to maintain consistent engine performance

Quality Assurance and Warranty

Autolite manufactures the XP3923 spark plug to meet strict quality standards, ensuring reliable ignition and durability. The use of iridium and platinum materials extends service life compared to conventional plugs. While specific warranty details are not provided, Autolite products typically adhere to industry standards for performance and reliability.