NGK 3107 Spark Plug

NGK Laser Iridium Spark Plug for Honda Civic

NGK Laser Iridium Spark Plug Part Number 3107 is an OE-style ignition component built for precise spark delivery and stable performance. It is listed for 2003-2005 Honda Civic applications and matches the factory-style 0.044 in. gap noted in the fitment data.

Key Features

• Laser Iridium center electrode tip for consistent ignition performance
• Nickel ground electrode with trapezoid tip design
• 5000 ohm resistance for modern ignition system requirements
• Flat seat, 14.00 mm thread diameter, and 0.75 in. reach
• 5/8 hex size with non-removable nut terminal
• Pre-gapped at 0.044 in. per listed specification
• NGK part number 3107 / IFR5G-11K

Product Details

As part of NGK’s Laser Iridium Spark Plug line, this plug reflects the brand’s OE-focused approach to ignition service. NGK supplies spark plugs for a wide range of domestic and import vehicles, and this design uses an iridium center electrode with a copper core to support reliable spark characteristics and long-term service consistency. For 2003-2005 Honda Civic owners, Part Number 3107 is a direct-fit spark plug option that follows the listed factory-style dimensions and heat range 5 specification.

This part cross-references Anchor 3107 and 3395 for the same application.

Common Issues Addressed

• Engine misfire caused by worn or fouled spark plugs
• Hard starting from weak or inconsistent spark output
• Rough idle and hesitation during acceleration
• Reduced fuel economy from degraded ignition performance
• Loss of throttle response in aging Honda Civic ignition systems

Installation Notes

Fits 2003-2005 Honda Civic, N/A. Verify the 0.044 in. gap and confirm the flat-seat, 14 mm thread, 0.75 in. reach, and 5/8 hex match the engine specification before installation. Follow the vehicle service procedure for torque and plug replacement intervals, and inspect ignition components for wear while servicing the spark plugs.

Quality Assurance

NGK is a long-established OE supplier with manufacturing and distribution operations in North America and globally. The brand’s focus on original equipment standards supports consistent fit, durability, and operational performance for service replacement applications.