Champion 429 Spark Plug

Champion Copper Plus 429 Spark Plug

Champion Copper Plus 429 is a spark plug built for dependable ignition performance and steady heat control. Its copper core electrode supports conductivity and wear characteristics suited for routine secondary ignition service.

For drivers searching for a Champion spark plug for Honda Civic or Toyota Corolla maintenance, this plug offers a straightforward OE-style service part with a 0.035 pre-gap, flat seat, and removable nut terminal. The Champion Copper Plus line focuses on practical ignition performance for everyday driving.

Key Features

• Copper core electrode for improved conductivity and heat control
• Nickel center electrode tip and nickel ground electrode core material
• Pre-gapped to 0.035 in. / 0.90 mm
• Flat seat design
• Resistor type: No
• Reach: 0.813 in.
• Hex size: 1.125 in. / 28.580 mm
• Electrical terminal type: removable nut

Product Details

Champion Copper Plus 429 is part of the Copper Plus product line, which uses a copper core electrode to support conductivity and heat management for consistent wear over normal service intervals. The nickel tip materials and standard flat-seat design make this spark plug a practical choice for routine ignition maintenance where the original application calls for this configuration. If you are replacing a worn plug in a Honda Civic or Toyota Corolla, Champion 429 provides the core specifications needed for a direct service match when the vehicle calls for this plug type.

This part cross-references 3X for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark delivery
• Misfire symptoms related to degraded ignition performance
• Reduced fuel efficiency from inefficient combustion
• Maintenance replacement for plugs with excessive wear

Installation Notes and Tips

Verify the required seat type, reach, terminal style, and gap specification before installation. Champion 429 is pre-gapped to 0.035 in., but the gap should still be checked against the vehicle service specification before use. Confirm the engine calls for a resistorless plug and a removable nut terminal. Use proper spark plug service procedures to avoid thread damage and ensure correct torque.

Quality Assurance

Champion Copper Plus spark plugs are built around a copper core design for dependable ignition service and controlled heat transfer. Part number 429 is manufactured to support routine replacement needs in applications that specify this plug configuration.