Autolite XP3924 Spark Plug

Overview of Autolite Iridium Spark Plug XP3924

The Autolite Iridium Spark Plug XP3924 is engineered for reliable ignition performance across a wide range of vehicles including Acura, BMW, Ford, Honda, 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 ohms resistance to reduce electrical noise
• Flat seat type with M14 x 1.25 thread size and 0.75 inch reach
• Pre-gapped at 0.044 inches (1.1 mm) for precise ignition timing
• Ceramic insulator with 2.007 inch (51 mm) height for heat resistance
• Washer included and non-removable nut electrical terminal type

Detailed Product Description

The Autolite Iridium Spark Plug XP3924 belongs to the Iridium Spark Plug line, known for combining iridium and platinum materials to deliver consistent spark performance and extended service life. The fine wire center electrode made of iridium ensures a stable and efficient spark, while the copper core enhances electrical conductivity. The taper cut ground electrode with a platinum tip reduces wear and maintains spark quality over time. This spark plug features a resistor type design with 4000 ohms resistance to minimize radio frequency interference, making it suitable for modern vehicles with sensitive electronics.

With a flat seat and a thread size of M14 - 1.25, the XP3924 is compatible with a broad range of vehicles including popular models such as the Toyota 4Runner, BMW 328i, Ford Mustang, Honda Civic, and Volkswagen Jetta. The pre-gap size of 0.044 inches (1.1 mm) is factory set to optimize ignition timing and combustion efficiency. The ceramic insulator provides excellent heat resistance, supporting the manufacturer heat range rating of 9, suitable for performance applications.

Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance and throttle response
• Reduces ignition system electrical noise and interference
• Enhances fuel efficiency by ensuring complete combustion
• Supports stable engine operation under high load and performance conditions

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Check and adjust the spark plug gap if necessary, though the XP3924 comes pre-gapped
• Inspect ignition components for wear during replacement to ensure optimal performance
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer

Quality Assurance and Warranty

The Autolite Iridium Spark Plug XP3924 is manufactured to meet strict quality standards, ensuring reliable ignition performance and durability. The use of premium materials such as iridium and platinum contributes to extended service life. While specific warranty details are not provided, Autolite products typically come with manufacturer-backed quality assurance to support customer confidence in fitment and function.