NGK 91064 Spark Plug

NGK Laser Iridium Spark Plug 91064

NGK 91064 is a Laser Iridium High Ignitability spark plug built for precise ignition performance and OE-style durability. 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 engines.

Compatible With select Honda Civic and Acura applications, this NGK spark plug is part of the Laser Iridium High Ignitability line, which focuses on stable ignition characteristics and long service life in demanding daily driving conditions.

Key Features

• Laser Iridium High Ignitability design for consistent spark performance
• Iridium center electrode tip material for durability and ignition precision
• Square platinum ground electrode tip design
• 0.036 pre-gap size
• 5,000 ohm resistor for ignition system control
• Copper center electrode core and nickel ground electrode core
• Flat seat, 10.00 mm thread diameter, 0.75 reach, 5/8 hex
• NGK part number 91064, manufacturer part number SIMR8A9

Product Details

NGK 91064 is engineered as a secondary ignition component for engines that require a fine-wire iridium plug with OE-level fit and function. The Laser Iridium High Ignitability line is designed around efficient spark initiation and dependable combustion support, making it a strong match for drivers maintaining factory ignition specifications. This part cross-references Dayco 91064 for the same application.

For shoppers searching for a Honda Civic spark plug replacement or an Acura ignition tune-up part, NGK 91064 provides the core specifications needed for accurate selection. The combination of iridium and platinum electrode materials supports stable ignition performance under normal operating conditions.

Common Issues This Part Can Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire symptoms related to degraded spark plugs
• Reduced throttle response from weak spark delivery
• Maintenance replacement for factory-style ignition service

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. NGK 91064 uses a flat seat, 10.00 mm thread diameter, 0.75 reach, and manufacturer heat range 8. Check the gap against engine specifications before installing, and confirm the electrical terminal type is correct for the ignition coil or wire connection. For Honda Civic and Acura fitment searches, always match the engine application to the vehicle’s original spark plug specification.

Quality Assurance

NGK is a long-established OE supplier with broad coverage across domestic and import vehicles. Its manufacturing and distribution network supports consistent product standards for automotive ignition service, and the brand’s OE background is reflected in the design of part number 91064.