Champion 9403 Spark Plug

Reliable Ignition Performance for Chrysler, Dodge, and Jeep Vehicles

The Champion Iridium 9403 spark plug is engineered to deliver consistent ignition and efficient combustion for a range of Chrysler, Dodge, and Jeep models. Designed with durable materials and precise specifications, this spark plug supports optimal engine performance and longevity.

• Iridium center electrode tip for enhanced durability and ignition
• Platinum ground electrode core material with J gap design
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.045 inches (1.15 mm) for precise spark delivery
• Tapered seat type with a reach of 0.984 inches and thread diameter of 14 mm
• Resistor type spark plug to reduce electrical interference
• Hex size of 0.625 inches (15.88 mm) for standard installation tools
• Manufacturer heat range rating of 14 suitable for various driving conditions

Champion Iridium Product Line Overview

The Champion Iridium line focuses on advanced spark plug technology, combining iridium and platinum materials to improve ignition reliability and electrode life. The 9403 spark plug benefits from this technology by offering a fine iridium center electrode tip paired with a platinum ground electrode core, which enhances wear resistance and maintains consistent spark performance over time.

Technical Details and Compatibility

This spark plug features a single ground electrode with a J gap design, which helps maintain stable spark gaps and efficient combustion. The non-removable nut terminal ensures a secure electrical connection, while the tapered seat and precise thread diameter of 14 mm provide proper fitment and sealing. With a pre-gap size of 0.045 inches (1.15 mm) and an insulator height of 0.12 inches, the 9403 spark plug is engineered to meet the specific ignition requirements of compatible vehicles.

Compatible Vehicles and Applications

• Chrysler 300, Aspen, Caravan, Sebring, Stratus, PT Cruiser, Voyager
• Dodge Charger, Durango, Magnum, Neon, Ram 1500, Ram 2500, Ram 3500
• Jeep Commander, Grand Cherokee, Liberty, TJ, Wrangler

This spark plug is designed for use in secondary ignition systems of these models, supporting efficient combustion and engine responsiveness.

Common Issues Addressed by Champion Iridium 9403 Spark Plug

• Misfires and rough idling due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold or variable conditions
• Engine hesitation or loss of power under load
• Electrical interference affecting onboard electronics

Installation Notes and Tips

Ensure the engine is cool before removing old spark plugs. Use a torque wrench to install the Champion Iridium 9403 spark plug to the manufacturer’s recommended torque specifications to avoid damage. Verify the pre-gap size of 0.045 inches (1.15 mm) before installation, although the plug comes pre-gapped. The 0.625 inch (15.88 mm) hex size allows for standard spark plug sockets. Proper installation will help maintain optimal ignition performance and prevent misfires.

Quality Assurance and Warranty

Champion spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Champion Iridium 9403 spark plug includes a resistor to minimize electrical interference and is built with premium iridium and platinum materials for extended service life. Warranty coverage details should be confirmed with the vehicle manufacturer or authorized Champion distributor.