NGK 5958 Spark Plug

NGK CPR6EB-9 Spark Plug for OE-Style Ignition Service

NGK 5958 is a standard spark plug built for dependable secondary ignition performance in a wide range of domestic and import applications. With a copper center electrode core, nickel center and ground electrode tips, and a 5,000 ohm resistor, this plug is engineered for stable spark delivery and reduced electrical noise.

As part of the NGK Standard Spark Plug line, CPR6EB-9 reflects the brand’s OE-focused approach to ignition components. It is a practical choice for drivers searching for an NGK spark plug 5958 replacement, a CPR6EB-9 ignition service part, or a standard copper-core plug for routine maintenance on vehicles such as Honda Civic and similar applications.

Key Features

• NGK part number 5958 / CPR6EB-9
• Standard spark plug design for OE-style service
• Copper center electrode core for consistent conductivity
• Nickel center and ground electrode tip materials
• 5,000 ohm resistor for ignition noise suppression
• Standard ground configuration with one ground electrode
• Pre-gapped at .036 inch
• Flat seat, 10.00 mm thread diameter, .75 inch reach
• 5/8 hex size and non-removable nut terminal

Detailed Description

NGK 5958 is built to match the needs of engines that call for a standard heat range 6 spark plug with a .036 inch pre-gap. The copper core supports efficient heat transfer, while the nickel electrode materials provide a conventional serviceable design for everyday ignition maintenance. Its flat seat, 10.00 mm thread diameter, and .75 inch reach make it a direct-fit style plug for applications specified to use CPR6EB-9.

NGK’s long OE supply history and broad coverage across automotive, motorcycle, marine, and small engine categories support the brand’s reputation for precise manufacturing and consistent fitment. For shoppers comparing NGK 5958 against other ignition parts, this plug is a straightforward replacement option for vehicles that specify the CPR6EB-9 configuration, including Honda Civic applications where that part number is listed.

This part cross-references Honda OEM 31916-HN8-F41 for the same application.

Common Problems This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition performance
• Misfire conditions related to excessive plug wear
• Reduced fuel economy from inefficient spark delivery
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Verify the engine calls for CPR6EB-9 / NGK 5958 before installation. Check the specified gap, thread reach, and seat type against the original plug, and inspect the ignition coil, wires, or boots for wear before fitting new plugs. Use proper torque procedures for the cylinder head material and confirm the terminal style matches the vehicle’s ignition lead or coil connection.

For fitment-based searches, this spark plug is relevant to Honda Civic applications where the OEM cross-reference 31916-HN8-F41 is specified. Always confirm the engine code and plug specification before service.

Quality Assurance

NGK manufactures ignition components to original equipment standards and supplies spark plugs for a broad range of vehicle applications. The CPR6EB-9 / 5958 is produced under NGK’s established quality and distribution systems for consistent service performance.