Champion 71-1 Spark Plug - Exhaust Side

Champion Copper Plus Spark Plug 71-1

Champion Copper Plus 71-1 is a standard replacement spark plug built for dependable ignition performance across a wide range of vehicles and small-engine applications. Its copper core electrode improves conductivity and heat control, while the nickel ground electrode supports consistent wear characteristics for everyday service.

Key Features

• Copper center electrode for strong conductivity and heat management
• Nickel ground electrode core and tip material for standard replacement durability
• Pre-gapped at 0.035 in. for common OE-style applications
• Resistor design helps reduce electrical noise
• Flat seat with washer included
• Non-removable nut terminal and 14 mm thread diameter
• Champion Copper Plus small engine classification

Product Details

The Champion Copper Plus line focuses on straightforward, OE-style ignition service, and part number 71-1 follows that approach with a copper core electrode for conductivity and heat control. This spark plug uses a standard center electrode design, a nickel copper alloy ground electrode, and a 12 heat range to support stable operation in the applications listed below. It cross-references Autolite 3926 for the same application.

Compatible With applications such as 2003-2005 Honda Civic, 2005-2009 Subaru Outback, 2006-2011 Kia Rio, and 2005-2009 Land Rover Range Rover Sport. It also appears in fitment for 2005-2008 Toyota Corolla, 2000-2011 Subaru Impreza, and 2006-2009 Mercedes-Benz S500, making Champion 71-1 a useful reference when matching OE-style spark plug specifications.

Common Issues This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent ignition output
• Misfire conditions related to electrode wear
• Reduced throttle response from degraded spark delivery
• Maintenance replacement for vehicles using the listed plug type

Installation Notes and Tips

Verify the plug type, thread diameter, reach, seat style, and heat range against the vehicle service information before installation. The pre-gap is listed at 0.035 in., but always confirm gap requirements for the specific engine application. Use proper torque procedures for flat-seat plugs with a washer to help ensure correct sealing and consistent heat transfer.

Quality Assurance

Champion designs Copper Plus spark plugs for dependable performance in standard replacement service. The copper core electrode and nickel-based ground electrode materials are selected to support conductivity, heat control, and normal wear characteristics in the specified fitments.