NGK 7300 Spark Plug

NGK Iridium IX Spark Plug 7300

NGK Iridium IX Spark Plug 7300 is built for drivers who want precise ignition performance and OE-level fitment across a wide range of GM applications. This spark plug uses an iridium center electrode, copper core, and nickel ground electrode to support consistent firing and stable operation in compatible vehicles.

Compatible With select Buick, Chevrolet, Pontiac, Saturn, Cadillac, and Oldsmobile applications, including Buick Lucerne, Chevrolet Impala, and Chevrolet Malibu fitments listed below. The NGK 7300 is also referenced by part number TR4IX.

Key Features

• Iridium center electrode tip material for focused spark delivery
• Copper center electrode core material for efficient heat transfer
• Nickel ground electrode core material with standard ground configuration
• Taper cut ground electrode tip design
• 5,000 ohm resistance
• 14 mm thread diameter, 5/8 hex size, tapered seat
• Pre-gap size: .040 inch
• Manufacturer heat range: 4
• Non-removable nut terminal type

Product Details

NGK’s Iridium IX Spark Plug line focuses on durable ignition components for domestic and import vehicles, backed by the company’s long OE supply history and broad application coverage. Part number 7300 is engineered with an iridium tip and copper-core construction to support reliable spark delivery and steady combustion in the vehicles listed in the fitment data. This spark plug is a direct service part for many GM platforms, including Chevrolet Impala, Chevrolet Malibu, Pontiac G6, and Saturn Vue applications.

This part cross-references Bosch 9612 and DENSO Auto Parts 5022 for the same application.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire conditions related to degraded ignition performance
• Rough idle from weak or unstable spark output
• Reduced throttle response from aging secondary ignition components
• Service intervals where the original spark plug no longer maintains proper firing characteristics

Installation Notes and Tips

• Verify vehicle-specific fitment before installation.
• Adjust spark plug gap to the specification listed for the application: many listed vehicles require 0.044 inch, while several older applications call for 0.045 inch or 0.035 inch.
• Use the correct torque procedure for the engine and cylinder head material.
• Inspect ignition coils, boots, and wires during spark plug service.
• Confirm the tapered seat and 14 mm thread size match the engine specification.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across automotive, motorcycle, marine, and small engine applications. The 7300 Iridium IX Spark Plug reflects that OE-focused manufacturing approach with original-equipment standards for durability and operational performance.

Fits 2009-2011 Buick Lucerne, N/A. Fits 2006-2011 Chevrolet Impala, N/A. Fits 2006-2010 Chevrolet Malibu, N/A. Fits 2006-2010 Pontiac G6, N/A. Fits 2008-2010 Saturn Vue, N/A. Fits 2006-2009 Chevrolet Uplander, N/A. Fits 2006-2009 Pontiac Montana, N/A. Fits 2007-2008 Saturn Aura, N/A. Fits 2006-2007 Buick Terraza, N/A. Fits 2006-2007 Chevrolet Monte Carlo, N/A. Fits 2006-2007 Saturn Relay, N/A. Fits 1987-1994 Chevrolet Cavalier, N/A. Fits 1990-1994 Chevrolet Lumina, N/A. Fits 1991-1994 Pontiac Sunbird, N/A. Fits 1993 Buick Century, N/A. Fits 1987-1989 Buick Century, N/A. Fits 1988-1993 Buick Regal, N/A. Fits 1987-1993 Chevrolet Corsica, N/A. Fits 1993 Oldsmobile Cutlass Ciera, N/A. Fits 1987-1989 Oldsmobile Cutlass Ciera, N/A. Fits 1988-1993 Oldsmobile Cutlass Supreme, N/A. Fits 1988-1993 Pontiac Grand Prix, N/A. Fits 1987-1991 Chevrolet Cavalier, N/A. Fits 1987-1991 Chevrolet Corsica, N/A. Fits 1987-1991 Pontiac 6000, N/A. Fits 1987-1991 Pontiac Tempest, N/A. Fits 1987-1990 Chevrolet Celebrity, N/A. Fits 1987-1989 Buick Skyhawk, N/A. Fits 1987-1989 Oldsmobile Cutlass Cruiser, N/A. Fits 1987-1988 Cadillac Cimarron, N/A. Fits 1987-1988 Oldsmobile Firenza, N/A. Fits 1987 Oldsmobile Firenza, N/A.