NGK 4002 Spark Plug

NGK 4002 Standard Spark Plug Overview

NGK 4002 is a standard spark plug built for reliable ignition performance in a wide range of domestic and import applications. As part of the NGK Standard Spark Plug line, it uses a copper core center electrode, nickel tip materials, and a 10,000 ohm resistor to support stable spark delivery and reduced electrical noise.

For drivers searching for an NGK spark plug for Honda Civic or Toyota Corolla service, this plug is a straightforward OE-style replacement option. The NGK 4002 part number is also referenced as BMR6A SOLID, making it easier to match the correct ignition component during maintenance.

Key Features

• Standard spark plug design for routine ignition service
• Copper center electrode core for efficient heat transfer
• Nickel center and ground electrode tip materials
• 10,000 ohm resistor for radio-frequency interference control
• Pre-gapped to .028 for installation consistency
• 14 mm thread diameter, .375 reach, and flat seat design
• Single ground electrode with standard configuration
• 3/4 inch hex size and non-removable nut terminal

Detailed Description

NGK 4002 is engineered to meet original equipment standards for durability and operational performance. The copper core helps manage heat, while the nickel electrode construction supports dependable spark characteristics in everyday driving conditions. With a manufacturer heat range of 6, this plug is suited to applications that call for a standard heat range and conventional electrode layout.

NGK’s long history as an OE supplier is reflected in the design of this spark plug, which is intended for drivers and technicians who need a direct replacement for routine tune-up work. If you are servicing a Honda Civic, Toyota Corolla, or another vehicle that specifies this style of plug, NGK 4002 offers a practical match for standard ignition maintenance. This part cross-references AMS Automotive 4002 for the same application.

What This Spark Plug Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire symptoms related to degraded plug electrodes
• Reduced fuel economy from weak spark output
• Ignition noise concerns in sensitive electrical systems

Installation Notes and Tips

Verify the required thread diameter, reach, seat type, and heat range against the vehicle service specification before installation. The pre-gap size is .028, but technicians should confirm gap settings against the application and engine condition. Use proper torque procedures for the flat seat design and inspect the ignition system, including wires or coils, when replacing plugs on Honda Civic or Toyota Corolla service jobs.

Quality Assurance

NGK manufactures spark plugs for a broad range of automotive, motorcycle, marine, and small engine applications, with North American OE-focused production and distribution support. The NGK 4002 spark plug is built to original equipment standards for consistent fit and performance in the specified application.