NGK 2391 Spark Plug

NGK V-Power Spark Plug 2391 Overview

NGK V-Power Spark Plug 2391 is a direct-fit ignition component built around a copper core center electrode, nickel tip materials, and a 5,000 ohm resistor for stable secondary ignition performance. It is a practical choice for drivers servicing Acura RL, Acura TL, Acura SLX, Honda Passport, and other listed applications that call for NGK part number 2391.

The V-Power spark plug line uses a special side ground electrode design to promote consistent spark exposure and reliable combustion. For buyers searching for an NGK BKR5E-N-11 spark plug, this part number 2391 matches the listed OE-style service applications and gap specification.

Key Features

• NGK V-Power Spark Plug, part number 2391
• Cross-reference: NGK BKR5E-N-11
• 5,000 ohm resistor for ignition system noise control
• Copper center electrode core with nickel tip material
• Nickel ground electrode with special side ground design
• Pre-gapped to .044 inch; verify and adjust before installation
• 14 mm thread diameter, .75 inch reach, flat seat
• 5/8 hex size with non-removable nut terminal

Detailed Description

NGK has long supplied original equipment spark plugs for domestic and import vehicles in North America, and this V-Power plug reflects that OE-focused engineering approach. Part number 2391 is built with a copper core center electrode for efficient heat transfer, a nickel center tip, and a nickel ground electrode with a special side ground configuration. The .044 inch pre-gap and heat range 5 specification align with the listed service applications, including 1995-2002 Acura TL, 1996-2002 Acura RL, 1996-1999 Acura SLX, and 1996-2002 Honda Passport.

For shoppers comparing NGK 2391 against other ignition service parts, this spark plug is a straightforward replacement for vehicles that specify the BKR5E-N-11 design. It is also a relevant search match for Acura TL spark plug replacement, Honda Passport spark plug service, and Acura RL ignition tune-up maintenance.

This part cross-references 98079-5514J and 1765236 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded ignition performance
• Service interval maintenance on listed Acura and Honda models

Installation Notes and Tips

Confirm the vehicle application before installation and verify the plug gap at .044 inch, even though the plug is pre-gapped. Use the correct 5/8 inch spark plug socket and tighten to the vehicle manufacturer’s specification. Inspect ignition wires or coils during service, since worn secondary ignition components can affect plug performance. For Acura TL, Acura RL, Acura SLX, and Honda Passport applications, follow the service interval and torque guidance in the factory repair information.

Quality Assurance

NGK is a major OE spark plug supplier with decades of automotive manufacturing experience and broad coverage across domestic and import applications. Part number 2391 is produced to support original equipment standards for durability and consistent ignition performance in the listed fitments.