NGK 4458 Spark Plug

NGK Laser Iridium Spark Plug for Honda Civic

NGK Laser Iridium Spark Plug 4458 is an OE-style ignition component built for precise combustion performance and dependable secondary ignition service. It is a direct fit for select 2006-2011 Honda Civic applications and uses an iridium center electrode with a copper core for stable spark delivery.

Key Features

• Laser Iridium design for consistent spark performance
• Iridium center electrode tip with copper core
• Nickel ground electrode core with standard ground configuration
• Pre-gapped at 0.044 in. for the listed application
• 14.00 mm thread diameter, 26.5 mm reach, flat seat
• 5,000 ohm resistance and non-removable nut terminal
• Heat range 6 with 5/8 in. hex size

Product Details

NGK 4458, also identified as ILFR6J-11K, is engineered to match the requirements of select Honda Civic engines from 2006-2011. The Laser Iridium spark plug line focuses on precise electrode construction and OE-level fitment, making it a practical choice for drivers replacing worn plugs in a Honda Civic ignition service. NGK’s long history as an OE supplier supports the product’s application-specific design and manufacturing consistency.

This part cross-references DENSO Auto Parts 4704 for the same application.

Common Symptoms This Part Can Address

• Rough idle or inconsistent engine operation
• Hard starting caused by worn spark plug electrodes
• Misfire codes related to ignition wear
• Reduced throttle response from degraded spark delivery
• Fuel economy loss tied to aging plugs

Installation Notes

Verify the engine specification and plug gap before installation, even though this plug is listed at 0.044 in. for the confirmed application. Use the correct 5/8 in. spark plug socket and follow the manufacturer’s torque specification for the cylinder head. For fitment, this part fits 2006-2011 Honda Civic, N/A, with notes indicating actual OE manufacturer and Laser Iridium spark plug application details.

Quality Assurance

NGK is a major OE spark plug supplier in North America with extensive coverage across domestic and import vehicles. Part number 4458 is manufactured to original equipment standards for durability and operational performance in the listed Honda Civic applications.