Autolite APP64 Spark Plug

Autolite Double Platinum Spark Plug Overview

The Autolite Double Platinum Spark Plug APP64 is engineered for reliable ignition performance across a wide range of vehicles including BMW, Ford, Toyota, and Mercedes-Benz models. Designed with durable platinum electrodes and a tapered ground electrode tip, this spark plug ensures consistent spark delivery and long service life.

• Double platinum center and ground electrode tips for enhanced durability
• Nickel core ground electrode with tapered tip design for precise spark control
• Resistor type spark plug with 4000 ohm resistance to reduce electrical noise
• Ceramic mid-projection insulator for improved heat dissipation
• Flat seat type with 14.0 mm thread diameter and 0.750 inch reach
• Pre-gapped at 0.044 inches (1.10 mm) for optimal ignition performance
• Standard electrical terminal type (stud) and 13/16 inch (21 mm) hex size for easy installation

Detailed Product Features and Specifications

The Autolite Double Platinum Spark Plug APP64 features a platinum center electrode core and tip, paired with a platinum ground electrode tip, which provides enhanced wear resistance and consistent spark over time. The tapered ground electrode tip design, constructed with a nickel core, helps maintain a stable spark gap and improves ignition efficiency. This spark plug includes a 4000 ohm resistor to minimize radio frequency interference, ensuring smooth operation of onboard electronics.

The ceramic insulator with mid-projection design aids in heat control and prevents fouling, while the flat seat type and 14.0 mm thread diameter ensure compatibility with a variety of engines. The plug is pre-gapped to 0.044 inches (1.10 mm), suitable for many applications, including popular models like the BMW 325i, Ford Mustang, Toyota Camry, and Mercedes-Benz 380SEL.

About the Double Platinum Spark Plug Line

The Double Platinum Spark Plug line from Autolite is designed to provide a balance of durability and performance by utilizing platinum on both the center and ground electrodes. This design reduces electrode wear and maintains a consistent spark gap longer than conventional plugs, making it suitable for vehicles requiring reliable ignition under varied driving conditions. The APP64 is part of this line, offering a standard electrode design optimized for secondary ignition systems.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in compatible BMW, Ford, Toyota, and Mercedes-Benz models
• Helps resolve engine misfires caused by inconsistent spark delivery
• Improves cold start performance and throttle response
• Reduces radio frequency interference affecting vehicle electronics
• Prevents premature electrode wear in high mileage engines

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 APP64 comes pre-gapped at 0.044 inches (1.10 mm)
• Inspect ignition components for wear or damage during replacement
• Ensure the spark plug threads are clean and free of debris before installation

Quality Assurance and Warranty

Autolite spark plugs, including the APP64 Double Platinum Spark Plug, are manufactured to meet OEM standards for fit, form, and function. The use of high-quality materials such as platinum electrodes and ceramic insulators ensures durability and consistent performance. While specific warranty details may vary, Autolite products typically come with a limited warranty against defects in materials and workmanship.