Champion 439 Spark Plug

Reliable Ignition Performance for Select Vehicles

The Champion Copper Plus 439 spark plug is engineered to deliver consistent ignition performance for a range of vehicles including BMW, Chrysler, Dodge, Jeep, Mitsubishi, Saturn, Scion, and Toyota models. Designed with durable nickel electrodes and a precise pre-gap, this spark plug supports efficient combustion and engine operation.

• Ground electrode core material: Nickel for durability
• Center electrode tip material: Nickel
• Pre-gap size: 0.041 inches (1.05 mm) for optimal spark
• Non-removable nut electrical terminal type
• Flat seat type with 0.75 inch reach
• Thread diameter: 14 mm (0.551 inches)
• Resistor type spark plug to reduce electrical noise
• Hex size: 15.88 mm (0.625 inches) for installation
• Manufacturer heat range: 12

Champion Copper Plus Product Line Overview

The Copper Plus line from Champion focuses on spark plugs with copper cores and nickel electrodes, providing a balance of conductivity and durability. This line is designed to maintain stable ignition and resist electrode wear, making it suitable for a variety of secondary ignition applications. The 439 part number is a representative model within this line, offering reliable performance for compatible vehicles.

Technical Details and Compatibility

The Champion Copper Plus 439 spark plug features a single ground electrode made of nickel, paired with a nickel center electrode tip. The pre-gap is factory set at 0.041 inches (1.05 mm), ensuring proper spark gap for efficient combustion. It has a flat seat design and a reach of 0.75 inches, fitting securely in the combustion chamber. The thread diameter measures 14 mm, compatible with specific engine designs. This spark plug includes a resistor to minimize radio frequency interference, supporting vehicle electronics.

Applications and Problem Solving

• Compatible with BMW 850Ci, Chrysler Sebring, Dodge Ram 1500, Jeep Grand Cherokee, Mitsubishi Raider, Saturn Astra, Scion xB, Toyota 4Runner, Prius C, and other listed models
• Helps resolve misfires caused by worn or damaged spark plugs
• Improves cold start performance and throttle response
• Reduces engine hesitation and rough idling
• Supports consistent ignition timing and fuel efficiency

Installation Notes and Tips

Before installation, verify the spark plug gap matches vehicle specifications; the pre-gap is set at 0.041 inches but should be checked. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage. The non-removable nut electrical terminal requires compatible ignition wires or boots. Inspect the spark plug threads and seat to ensure proper fit and sealing.

Quality Assurance and Warranty

Champion Copper Plus spark plugs are manufactured to meet OEM standards for fit and function. The 439 spark plug undergoes quality control testing to ensure consistent performance. While specific warranty details are not provided here, Champion products typically come with manufacturer-backed quality assurance to support reliability in automotive ignition systems.