Champion 439 Spark Plug

Champion Copper Plus 439 Spark Plug

Champion Copper Plus 439 is a resistor spark plug built for dependable ignition performance and steady heat control. Its copper core electrode improves conductivity, while nickel center and ground electrode materials support consistent wear in everyday driving.

Compatible With select Toyota Prius C, Scion xB, Chrysler 200, Dodge Avenger, and Jeep Grand Cherokee applications, this plug is also used across a wide range of Chrysler, Dodge, Jeep, Toyota, BMW, Saturn, and Mitsubishi models. The Champion Copper Plus line focuses on OE-style service life and stable operation for secondary ignition systems.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Resistor design for reduced electrical noise
• Flat seat design
• Pre-gapped at 0.041 in / 1.05 mm
• 14 mm thread diameter with 0.75 in reach
• Hex size: 0.625 in / 15.880 mm
• Champion Copper Plus classification, part number 439

Detailed Description

Champion 439 is a Copper Plus spark plug engineered for dependable secondary ignition performance in a broad range of import and domestic vehicles. The copper core helps move heat away from the firing tip, while the nickel electrode construction supports stable spark delivery and normal wear characteristics. With a resistor design, flat seat, and OE-style plug type RC12MCC4, this spark plug is suited for routine maintenance on vehicles that call for this specification.

Fits 2012-2020 Toyota Prius C, N/A; 2013-2015 Scion xB, N/A; 2011-2014 Chrysler 200, N/A; 2008-2014 Dodge Avenger, N/A; 2008-2010 Chrysler Sebring, N/A; 2008-2010 Dodge Caliber, N/A; 2009-2010 Dodge Journey, N/A; 2009 Jeep Compass, N/A; 2009 Jeep Patriot, N/A; 2008-2009 Saturn Astra, N/A; 2007 Chrysler Aspen, N/A; 2000-2007 Dodge Dakota, N/A; 2000-2007 Dodge Durango, N/A; 2002-2007 Dodge Ram 1500, N/A; 2006-2007 Jeep Commander, N/A; 1999-2007 Jeep Grand Cherokee, N/A; 2006-2007 Mitsubishi Raider, N/A; 2004-2006 Scion xB, N/A; 2001-2005 Toyota Echo, N/A; 2000 Toyota 4Runner, N/A; 2000 Toyota Echo, N/A; 1995-1997 BMW 850Ci, N/A; 1988-1995 Toyota Pickup, N/A; 1993-1994 BMW 850Ci, N/A.

This part cross-references NGK 4043 and 5584 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent spark delivery
• Misfire conditions related to aged secondary ignition components
• Reduced throttle response from degraded plug performance
• Heat-related plug wear in daily-driven engines

Installation Notes and Tips

Verify the required plug type, thread diameter, reach, seat style, and gap before installation. This plug is specified with a 0.041 in pre-gap, but several listed vehicles call for application-specific gap settings in the fitment notes, so confirm the engine requirement before use. Inspect ignition coils, wires, and boots during service to avoid repeat misfire concerns.

Quality Assurance

Champion Copper Plus plugs are built around a copper core design for conductivity and heat control, with nickel electrode materials for consistent service characteristics. Part number 439 is manufactured to match the listed RC12MCC4 specification for the confirmed applications above.