NGK 4908 Spark Plug

NGK Standard Spark Plug 4908 Overview

NGK Standard Spark Plug 4908 is a copper-core, nickel-tipped spark plug built to OE-style specifications for steady ignition performance. It uses a 10 mm thread, flat seat, 14 mm hex, and a pre-gap of .036 for straightforward service on the correct application.

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s long OE supply background and focus on original-equipment standards for durability and consistent operation. The LMAR7A-9 design is a practical choice for drivers servicing ignition systems on select Honda Civic and Acura applications where the specified heat range and reach matter.

Key Features

• NGK part number 4908 / LMAR7A-9
• Copper center electrode core with nickel tip material
• Nickel ground electrode with standard ground configuration
• 5000 ohm resistance for ignition system noise control
• Manufacturer heat range 7
• 10.00 mm thread diameter, 26.5 mm reach, flat seat
• Pre-gapped to .036
• Stud terminal type and 14 mm hex size

Product Details

This spark plug is engineered around standard OE-style construction, using a copper core for the center electrode and nickel materials at the firing surfaces. That combination supports reliable spark delivery and stable combustion in the specified engine application. For shoppers searching for an NGK 4908 spark plug, LMAR7A-9 replacement, or a spark plug for Honda Civic and Acura models, this part provides the core dimensions and electrical characteristics needed for the correct fit.

This part cross-references AMS Automotive 4908 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition output
• Misfire conditions related to degraded plug electrodes
• Reduced fuel economy from incomplete combustion
• Loss of throttle response in the ignition system

Installation Notes and Tips

Verify the engine calls for LMAR7A-9 / 4908 before installation. Confirm thread diameter, reach, seat type, and heat range against the service specification for the vehicle. Use the specified gap setting if the application requires adjustment, and inspect ignition coils, boots, and wires during service to avoid repeat misfire concerns.

Fits select Honda Civic and Acura applications only when the engine specification matches this plug’s dimensions and heat range. Check the vehicle service information before installation.

Quality Assurance

NGK is a major OE spark plug supplier with extensive North American manufacturing and distribution support. The brand’s Standard Spark Plug line is built to maintain original-equipment standards for durability and operational performance.