Champion 405 Spark Plug

Overview of Champion Copper Plus 405 Spark Plug

The Champion Copper Plus 405 spark plug is engineered for reliable ignition performance in a wide range of vehicles including BMW, Chevrolet, Toyota, and Mercedes-Benz models. Designed with durable nickel and copper alloy components, this spark plug supports efficient combustion and consistent engine operation.

• Ground electrode core and center electrode tip made of nickel for durability
• Pre-set gap size of 0.035 inches for optimal spark delivery
• Flat seat type with a 0.75-inch reach and 14 heat range for precise fitment
• Resistor type spark plug to reduce electrical interference
• Non-removable nut electrical terminal for secure connection
• Compatible with various makes and models including Bentley, Buick, Dodge, Honda, Jeep, Rolls-Royce, and more

Champion Copper Plus Product Line Details

The Copper Plus line from Champion focuses on delivering spark plugs with copper cores and nickel alloy electrodes to balance conductivity and durability. This line is designed to provide consistent ignition performance and reliable heat dissipation, making it suitable for many domestic and import vehicles. The 405 part number within this line features a 14 heat range and flat seat design, ensuring compatibility with specific engine requirements.

Technical Specifications and Features

The Champion Copper Plus 405 spark plug features a nickel copper alloy ground electrode and a nickel center electrode tip, which contribute to stable spark generation and resistance to electrode wear. The pre-gap size is factory set at 0.035 inches, supporting optimal ignition timing and fuel efficiency. With a thread diameter of 14 mm (0.551 inches) and a reach of 0.75 inches, this spark plug fits securely in engines requiring a flat seat type. The resistor built into the plug helps minimize radio frequency interference, protecting vehicle electronics.

Applications and Problem Solving

• Restores engine misfire issues in compatible BMW 318i, 320i, and 325e models
• Improves ignition reliability in Chevrolet Camaro and Impala vehicles
• Supports smooth engine starts and consistent combustion in Toyota Land Cruiser and Honda Civic
• Reduces electrical noise that can affect onboard electronics in Mercedes-Benz 380SE and 560SEL
• Helps maintain fuel efficiency and engine performance in Dodge Charger and Jeep Cherokee

Installation Notes and Tips

• Ensure the spark plug gap is checked before installation, though it is pre-gapped at 0.035 inches
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Verify compatibility with your vehicle’s make and model, such as Bentley Continental or Plymouth Voyager
• Inspect the spark plug threads and clean the cylinder head threads before installation
• Replace spark plugs in sets to maintain balanced engine performance

Quality Assurance and Warranty

Champion Copper Plus spark plugs are manufactured to meet OEM standards for fit, form, and function. The 405 spark plug undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details may vary, Champion typically offers coverage against manufacturing defects, providing confidence in the product’s reliability for compatible vehicles including Cadillac, Chrysler, and Rolls-Royce models.