Autolite AP105 Spark Plug

Reliable Ignition with Autolite Platinum Spark Plug AP105

The Autolite Platinum Spark Plug AP105 is engineered to deliver consistent ignition performance for select Chevrolet, Ford, Mazda, and Mercury vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Platinum center electrode tip and core for enhanced durability
• Tapered ground electrode tip made of nickel for stable spark delivery
• Resistor type with 4000 ohms resistance to reduce electrical noise
• Ceramic mid-projection insulator for improved heat dissipation
• Standard 0.050 inch pre-gap size and 14 mm thread diameter
• Compatible with Chevrolet Silverado 1500, Ford Mustang, Mazda B4000, Mercury Cougar, and more

Product Features and Technical Specifications

The AP105 spark plug features a platinum center electrode tip and core, which provides longer service life compared to conventional spark plugs. The tapered nickel ground electrode tip ensures a consistent spark while resisting wear. With a 4000 ohm resistor, this spark plug minimizes radio frequency interference, protecting your vehicle’s electronic systems. The ceramic insulator with mid-projection design helps maintain optimal operating temperature and prevents misfires. The spark plug has a 14 mm thread diameter, 0.679 inch (17.0 mm) reach, and a 5/8 inch (16 mm) hex size for easy installation.

About the Autolite Platinum Spark Plug Line

The Platinum Spark Plug line by Autolite is designed to offer enhanced durability and reliable ignition performance through the use of platinum materials on the center electrode. This line targets vehicles requiring longer-lasting spark plugs that maintain stable combustion over time. The AP105 model fits within this line, providing a balance of performance and longevity for secondary ignition systems in various Ford, Chevrolet, Mazda, and Mercury models.

Compatible Vehicles and Applications

• Chevrolet Silverado 1500 and Aerostar
• Ford Mustang, Explorer, Ranger, Bronco II, Tempo, and Windstar
• Mazda B4000, Navajo, and Bobcat
• Mercury Cougar, Capri, Zephyr, and Topaz

Common Issues Addressed by Autolite AP105 Spark Plug

• Engine misfires and rough idling
• Poor fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Reduced engine power and acceleration
• Electrical interference affecting vehicle electronics

Installation Notes and Tips

Before installation, verify the spark plug gap is set to the recommended 0.050 inches. Use a torque wrench to tighten the spark plug to the manufacturer’s specifications to avoid damage to the tapered seat. The 5/8 inch hex size allows for standard spark plug socket compatibility. Ensure the engine is cool before replacing spark plugs to prevent thread damage. The AP105’s stud-type electrical terminal requires proper connection to the ignition wire for optimal performance.

Quality Assurance and Warranty

Autolite Platinum Spark Plugs are manufactured to meet OEM standards for fit, form, and function. The AP105 model undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details may vary, Autolite products typically come with a limited warranty against defects in materials and workmanship.