Autolite APP5426 Spark Plug

Reliable Ignition Performance for Chrysler, Dodge, Jeep, and Volkswagen

The Autolite Double Platinum Spark Plug APP5426 is engineered to deliver consistent ignition performance for select Chrysler, Dodge, Jeep, and Volkswagen vehicles. Designed with durable platinum electrodes and a tapered ground electrode tip, this spark plug supports efficient combustion and reliable engine operation.

• Double platinum center and ground electrode tips for extended wear
• Tapered ground electrode design with nickel core for durability
• Extra-long ceramic insulator for improved heat dissipation
• Standard electrical terminal type (stud) for secure connection
• Pre-gapped at 0.050 inches (1.30 mm) for optimal spark
• Resistor type with 4000 ohms resistance to reduce electrical noise
• Tapered seat type with 14 mm thread diameter and 25 mm reach
• Hex size 5/8 inch (16 mm) for easy installation

About the Autolite Double Platinum Spark Plug Line

The Double Platinum Spark Plug line from Autolite features spark plugs with platinum material on both the center and ground electrode tips. This design enhances electrode durability and maintains consistent spark performance over time. The APP5426 model benefits from this technology, providing reliable ignition for vehicles such as the Chrysler Town & Country and Jeep Wrangler, where long-lasting spark plugs are essential for maintaining engine efficiency.

Technical Details and Features

The APP5426 spark plug incorporates a platinum center electrode core and tip, paired with a platinum ground electrode tip supported by a nickel core. The tapered ground electrode tip design improves spark exposure and combustion efficiency. The extra-long ceramic insulator helps manage heat effectively, reducing the risk of misfires. With a resistor value of 4000 ohms, this spark plug minimizes electromagnetic interference, protecting vehicle electronics. The spark plug is pre-gapped to 0.050 inches (1.30 mm), ensuring optimal ignition timing out of the box.

Applications and Problem Solving

• Restores smooth engine starting and idling in Chrysler Grand Caravan and Dodge Caravan models
• Reduces misfires and rough running in Jeep Wrangler and Volkswagen Routan vehicles
• Helps maintain fuel efficiency and engine performance in Chrysler Pacifica and Town & Country
• Addresses ignition noise issues with built-in resistor design
• Supports consistent spark delivery under varied driving conditions

Installation Notes and Tips

• Ensure the spark plug gap is set to the factory specification of 0.050 inches (1.30 mm) before installation
• Use a 5/8 inch (16 mm) socket wrench for proper tightening
• Apply anti-seize compound sparingly on threads to prevent galling
• Torque to manufacturer’s recommended specifications to avoid damage
• Inspect ignition wires and boots for wear during replacement

Quality Assurance and Warranty

Autolite spark plugs, including the APP5426 Double Platinum Spark Plug, are manufactured to meet OEM standards for fit, form, and function. The use of platinum electrodes and high-quality ceramic insulators ensures durability and reliable performance. While specific warranty details may vary, Autolite products typically come with a limited warranty against defects in materials and workmanship.