NGK 5791 Spark Plug

NGK V-Power Spark Plug 5791 Overview

NGK V-Power Spark Plug 5791 is a copper-core spark plug built for stable ignition performance and OE-style serviceability. It uses a standard ground electrode design, a nickel center electrode tip, and a 5,000 ohm resistor to help control electrical noise in the ignition system.

Compatible With 1999-2003 Saab 9-5 and 2001 Acura Integra applications, this NGK spark plug is a direct replacement choice for drivers servicing factory-style ignition systems. The NGK V-Power Spark Plug line focuses on dependable combustion support across a wide range of domestic and import vehicles.

Key Features

• NGK V-Power Spark Plug, part number 5791
• Copper center electrode core for consistent conductivity
• Nickel center and ground electrode tip materials
• Standard ground electrode configuration with one ground electrode
• 5,000 ohm resistor for ignition noise suppression
• 14.00 mm thread diameter, 0.75 reach, flat seat
• Pre-gapped at .044 inches
• 5/8 hex size for standard spark plug service tools

Detailed Description

NGK 5791, also identified as BKR7E-11, is engineered with a copper core and nickel electrode construction to support reliable spark delivery in everyday driving conditions. The 7 heat range, standard tip design, and flat seat configuration make it a practical OE-style replacement for vehicles that call for this plug specification. For Saab 9-5 and Acura Integra service, the plug should be matched to the factory gap and ignition requirements before installation.

This part cross-references Anchor 3192 and 3299 for the same application.

What It Helps Address

• Misfire caused by worn or fouled spark plugs
• Hard starting from weak ignition output
• Rough idle related to inconsistent spark delivery
• Reduced throttle response from degraded plug performance
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Verify the specified gap before installation. The listed pre-gap is .044 inches, and the fitment notes call for a 0.039 inch gap on 1999-2003 Saab 9-5 applications and adjustment to 0.044 inches on the 2001 Acura Integra. Use the correct 5/8-inch spark plug socket, confirm the flat seat style matches the cylinder head, and follow the vehicle service manual for torque and replacement intervals.

Quality Assurance

NGK is a long-established OE supplier with extensive coverage across domestic and import vehicles, motorcycles, marine engines, and small engine applications. Part number 5791 is built to NGK manufacturing standards for durability and consistent ignition performance.