NGK 6213 Spark Plug

NGK Laser Iridium Spark Plug 6213 Overview

NGK 6213 is a Laser Iridium High Ignitability spark plug built for precise ignition performance and OE-style reliability. It uses an iridium center electrode, a square platinum ground electrode tip, and a 0.036 pre-gap to support consistent spark delivery in modern ignition systems.

For drivers searching for an NGK spark plug for Honda Civic or Acura applications, this part number 6213 is a direct-fit style replacement where specified by the vehicle application. NGK’s OE supplier background and North American manufacturing focus support dependable secondary ignition service.

Key Features

• Laser Iridium High Ignitability design for stable ignition performance
• Iridium center electrode tip material for durability and spark consistency
• Square platinum ground electrode tip design for efficient flame initiation
• 0.036 pre-gap size for OE-style setup
• 10 mm thread diameter, 14 mm hex size, and flat seat configuration
• 5000 ohm resistance for ignition system compatibility
• NGK part number 6213, also identified as SILMAR9A9S

Product Details

NGK 6213 is engineered as a secondary ignition spark plug for vehicles that call for a Laser Iridium High Ignitability design. The copper core center electrode helps manage heat transfer, while the nickel ground electrode core and non-removable nut terminal support secure electrical connection. With a manufacturer heat range of 9 and a 26.5 reach, this spark plug is specified for applications that require these exact dimensions and electrical characteristics.

This part cross-references AMS Automotive 6213 for the same application. It is also associated with OE reference 31909-MEN-A31 in interchange data. When replacing spark plugs on Honda Civic or Acura models, verify the engine’s required thread diameter, reach, seat type, and gap before installation.

Common Issues This Part Can Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire conditions related to plug wear or gap drift
• Reduced throttle response from weak spark delivery
• Maintenance replacement for specified Honda Civic and Acura ignition service

Installation Notes and Tips

Confirm the vehicle’s required spark plug specification before installation, including thread diameter, reach, seat type, and heat range. Check the gap against the engine’s service specification even when the plug arrives pre-gapped at 0.036. Use proper torque procedures for flat-seat spark plugs and inspect ignition coils, boots, and wiring during service to help prevent repeat misfire concerns.

Quality Assurance

NGK is a long-established OE spark plug supplier with extensive coverage across domestic and import vehicle applications in North America. Part number 6213 is manufactured to support original-equipment-level fit and performance standards for specified applications.