NGK 7994 Spark Plug

NGK Laser Iridium Spark Plug 7994

NGK Laser Iridium Spark Plug 7994 is built for drivers who need OE-style ignition performance and precise fitment across a wide range of import and domestic applications. This spark plug uses an iridium center electrode tip, a copper core center electrode, and a nickel ground electrode to support consistent spark delivery and stable combustion.

Compatible With many Hyundai, Kia, Subaru, Mazda, Mercedes-Benz, Nissan, and Mitsubishi applications, this NGK spark plug is a direct service part for vehicles that call for a 0.044 in. gap in the listed applications. The Laser Iridium design is used in OE-equivalent service intervals on select vehicles, including several Hyundai, Kia, Subaru, and Mazda models.

Key Features

• NGK Laser Iridium Spark Plug line for OE-style ignition service
• Iridium center electrode tip for durable spark performance
• Copper core center electrode for heat transfer support
• Nickel ground electrode with standard configuration
• Pre-gapped at .044 in. for many listed applications
• 14 mm thread diameter, 5/8 in. hex size, flat seat
• 5000 ohm resistance and non-removable nut terminal

Product Details

NGK is a long-established OE supplier in North America with broad coverage across automotive, motorcycle, marine, and small engine ignition applications. Part number 7994, also identified as IFR5E11, is part of NGK’s Laser Iridium Spark Plug family and is engineered for vehicles that specify this plug style and heat range. This part cross-references Carlson 7994 for the same application.

Use this spark plug for service on vehicles such as the 2006-2011 Kia Rio, 2005-2010 Subaru Forester, 2006-2008 Hyundai Sonata, and 2001-2006 Hyundai Santa Fe when the listed gap and application notes match your engine requirements. It also appears in fitment for select Mercedes-Benz, Nissan, Mazda Miata, and Mitsubishi Eclipse applications.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weak ignition output
• Misfire conditions tied to plug wear or incorrect gap
• Reduced throttle response from inconsistent spark delivery
• Service intervals due for OE-style ignition maintenance

Installation Notes

• Verify engine application, heat range, and seat type before installation.
• Check the listed gap for your vehicle; many applications call for 0.044 in., while some Mercedes-Benz and other models use different specifications.
• Follow the vehicle service manual for torque and plug replacement procedure.
• Inspect ignition coils, boots, and wires during spark plug service.

Quality Assurance

NGK manufactures ignition components to OE standards and supports broad vehicle coverage backed by decades of automotive expertise. Part number 7994 is built for consistent service in the applications listed above, including many Hyundai Accent, Kia Optima, and Subaru Impreza fitments.