NGK 5424 Spark Plug

NGK V-Power Spark Plug for OE-Style Ignition Performance

The NGK V-Power Spark Plug, part number 5424, is built for drivers who need a direct-fit ignition component with consistent firing characteristics. It is a fitment-based replacement for select Saturn SC1, SL, SL1, and SW1 applications, along with several Rolls-Royce models listed below.

Key Features

• NGK V-Power Spark Plug design for stable ignition performance
• Copper center electrode core with nickel center electrode tip material
• Nickel ground electrode core material with standard ground configuration
• 5,000 ohm resistance for ignition system compatibility
• Pre-gapped at .044 inch from the manufacturer
• 14 mm thread diameter, .75 inch reach, and flat seat design
• 5/8 inch hex size with non-removable nut terminal
• Manufacturer heat range 4

Product Details

NGK part number 5424, also identified as BKR4E-11, is part of the V-Power Spark Plug line. NGK is a long-established OE supplier with broad coverage across domestic and import vehicles, and this plug reflects that background with OE-style construction and application-specific fitment. It is listed for Saturn SC1, Saturn SL, Saturn SL1, and Saturn SW1 models, plus Rolls-Royce Silver Spur, Corniche IV, Corniche S, Flying Spur, Silver Spirit, and Touring Limousine applications shown in the fitment data.

This spark plug uses a copper core center electrode, nickel electrode materials, and a standard single-ground configuration to support consistent spark delivery. The .044-inch pre-gap should be verified against the vehicle specification before installation, since several listed applications note a different required gap. This part cross-references Carlson 7563 and 7817 for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded ignition performance
• Maintenance replacement for high-mileage ignition service

Installation Notes and Tips

Verify the required gap for the exact vehicle before installation. Fitment notes call for 0.040 inch on Saturn SC1, SL, SL1, and SW1 applications, while several Rolls-Royce listings specify a 0.035-inch gap. Confirm thread diameter, reach, seat type, and heat range match the engine specification before tightening. Use proper spark plug service procedures to avoid thread damage and ensure correct torque.

Quality Assurance

NGK manufactures spark plugs for a wide range of automotive, motorcycle, marine, and small engine applications, with production and distribution support across North America and global facilities. Part number 5424 is built to original equipment standards for durability and operational performance.