NGK 93675 Spark Plug

NGK Laser Iridium Spark Plug 93675

NGK 93675 is a Laser Iridium High Ignitability spark plug built for precise ignition performance and OE-style service life. It uses an iridium center electrode, a square platinum ground electrode tip, and a 0.036 in pre-gap to support consistent spark delivery in modern engines.

Compatible With Honda Civic and other applications that call for NGK 93675, this spark plug reflects NGK’s long OE supply background and focus on original equipment standards. The SILMAR7A9S reference and 10 mm thread diameter make it a direct-spec replacement for the listed application.

Key Features

• Laser Iridium High Ignitability design for stable ignition performance
• Iridium center electrode tip material for durability and fine-wire spark delivery
• Square platinum electrode ground tip for improved ignitability
• 5000 ohm resistance for ignition system compatibility
• 0.036 in pre-gap for OE-style setup
• 10 mm thread diameter, 26.5 reach, and flat seat configuration
• Non-removable nut terminal and 14 mm hex size

Detailed Description

NGK 93675 is a secondary ignition spark plug engineered with a copper core center electrode and iridium tip to support reliable combustion in demanding engine environments. The nickel ground electrode core and single-ground configuration help maintain a controlled spark path, while the flat seat and specified heat range 7 support proper fitment where this plug is called for. For Honda Civic service work and other NGK 93675 applications, this plug is a direct-spec ignition component that aligns with OE requirements.

NGK’s manufacturing background as a major OE supplier in North America adds confidence for technicians and DIY buyers looking for a spark plug that matches factory-style dimensions and electrical characteristics. The part number 93675 is also identified as SILMAR7A9S for cross-reference purposes.

This part cross-references Honda 31909-HL4-003 for the same application.

What It Helps Address

• Engine misfire caused by worn or fouled spark plugs
• Hard starting from weak ignition output
• Rough idle related to inconsistent spark delivery
• Reduced throttle response from degraded plug performance
• Maintenance replacement for specified Honda Civic ignition service

Installation Notes and Tips

Verify the thread diameter, reach, seat type, heat range, and pre-gap against the vehicle service specification before installation. Use the correct spark plug socket for the 14 mm hex and inspect the ignition coil, boots, and threads during service. For Honda Civic applications and other vehicles listed for NGK 93675, follow the manufacturer torque specification and confirm the plug gap if the engine application requires checking before install.

Quality Assurance

NGK is a long-standing OE supplier and manufacturer with extensive coverage across domestic and import vehicles. The 93675 spark plug is produced to support original equipment standards for durability and operational performance.