NGK 3112 Spark Plug

NGK Standard Spark Plug 3112 Overview

NGK Standard Spark Plug 3112 is a conventional replacement spark plug built for steady ignition performance in a wide range of domestic and import applications. It uses a copper center electrode core with a nickel center tip and nickel ground electrode tip for dependable spark delivery and consistent combustion.

With a 14 mm thread diameter, .46 reach, flat seat, 13/16 hex, and removable nut terminal, this NGK spark plug is specified for engines that call for a standard-resistance plug with a .028 pre-gap. The B-4L design and heat range 4 configuration make it a practical OE-style service part for routine tune-ups.

Key Features

• NGK Standard Spark Plug, part number 3112
• Copper core center electrode for stable ignition transfer
• Nickel center and ground electrode tip materials
• Standard ground electrode design with one ground electrode
• 1 ohm resistance for ignition system compatibility
• .028 pre-gap for specified applications
• 14 mm thread diameter, .46 reach, flat seat
• 13/16 hex with removable nut terminal

Product Details

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s long OE supply background and focus on original-equipment-level service parts. NGK has extensive coverage across automotive, motorcycle, marine, and small engine applications, and the 3112 follows that approach with a straightforward copper-core construction and standard electrode layout. For drivers searching for an NGK 3112 spark plug, B-4L spark plug, or a standard replacement spark plug for domestic and import vehicles, this part is built around common service specifications rather than specialty performance tuning.

This part cross-references Autolite 437 and Champion Spark Plug 218 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Misfire conditions related to aged ignition components
• Reduced fuel economy from incomplete combustion
• Loss of throttle response during routine service intervals

Installation Notes

Verify thread diameter, reach, seat type, heat range, and pre-gap against the vehicle service specification before installation. Use the correct torque procedure for the cylinder head material and inspect ignition wires or coils at the same time to avoid repeat misfire concerns. For fitment-focused searches, this NGK 3112 spark plug is commonly referenced for NGK 3112 Honda Civic applications and other vehicle-specific tune-up needs where the listed dimensions match the engine specification.

Quality Assurance

NGK manufactures spark plugs to OE standards and supplies a broad range of domestic and import vehicle applications in North America. The 3112 is built to support durable, consistent ignition performance when the vehicle calls for a standard copper-core spark plug with the listed specifications.