7 Best Spark Plugs for Infiniti G37: Expert-Tested Picks for 2026

List of 7 Best Spark Plugs For G37

Image	Title	Best For	Link
	Dragon Fire Ignition Coil Plug Kit	The dragon fire performance ignition coil and iridium spark plug kit for infiniti 3.7l v6 model… more	View on Amazon
	6-Piece Ignition Coil Plug Set	The 6-piece ignition coil pack and iridium spark plug set for infiniti and nissan 3.7l engines… more	View on Amazon
	A-Premium Double Iridium Spark Plugs	The a-premium 6-piece double iridium spark plug set for infiniti g37, q50, q60, q70, and nissan… more	View on Amazon
	OverstockDirect NGK Iridium Spark Plugs	The overstockdirect ngk laser iridium spark plugs for select infiniti and nissan 3.7l models 6-… more	View on Amazon
	NGK Laser Iridium Spark Plugs	The 6-piece set of ngk laser iridium spark plugs designed for infiniti g37 3.7l v6 engines offe… more	View on Amazon
	OKLPF Ignition Coil Plug Kit	The oklpf ignition coil pack and iridium platinum spark plug set for infiniti and nissan 3.7l o… more	View on Amazon
	UF617 Ignition Coil Plug Kit	The 6-piece uf617 oem ignition coil and spark plug kit for infiniti and nissan v6 v8 offers exc… more	View on Amazon

Detailed Reviews

This section provides an in-depth look at our top-recommended spark plugs for the Infiniti G37, covering their material composition, ignition performance, and suitability for daily driving versus high-performance tuning. Whether you are looking for a complete coil-and-plug refresh or individual OEM-replacement iridium plugs, these reviews analyze key features to help you make the best choice for your engine’s longevity.

The Dragon Fire kit is a robust solution for those experiencing ignition issues, providing a comprehensive set of coils and iridium spark plugs. Designed to be a direct replacement, it offers an immediate boost in spark consistency and ignition energy compared to worn-out factory parts.

The inclusion of ignition coils ensures that the entire ignition chain is revitalized, making this a great value for high-mileage G37 owners who need to troubleshoot performance loss or rough idling effectively.

This 6-piece kit is engineered for drivers who prioritize reliability and smooth acceleration. By focusing on cold start efficiency and high-temperature stability, it ensures that your G37 operates within peak parameters regardless of environmental conditions.

The kit matches numerous OE specifications, ensuring a seamless integration with your engine’s ECU. It’s a dependable choice for those looking to resolve misfires without dealing with compatibility headaches.

A-Premium provides a professional-grade spark plug set that excels in longevity. These double iridium plugs are designed to maintain peak ignitability over extremely long service intervals, making them an excellent investment for G37 owners who don’t want to worry about frequent maintenance.

The precision engineering behind the electrode material ensures consistent firing in high-compression engines, helping to maintain fuel efficiency throughout the life of the plug.

These plugs are the gold standard for Infiniti owners who want to stick with factory-original hardware. As NGK produces the OEM spark plugs for most G37 models, these units offer the perfect balance of performance and reliability that you would expect from the factory.

Because they are manufactured to original equipment standards, you don’t have to worry about compatibility issues or inconsistent firing. They are designed for total compatibility with the 3.7L V6 engine.

This specific NGK set is tailored for the G37, offering authentic replacement parts. It provides the same reliability and performance as the ones installed at the factory assembly line, making it a safe and effective choice for any maintenance interval.

By choosing this set, you benefit from the extensive R&D behind NGK’s Laser Iridium line, ensuring optimal flame kernel growth and efficient combustion within your V6 cylinders.

The OKLPF kit stands out for its high-performance iridium-platinum combination, which focuses on long-lasting durability and superior heat resistance. By coupling this with high-purity copper coil windings, it ensures a powerful, stable spark across various driving conditions.

It is particularly noted for addressing engine power loss and poor fuel consumption, making it a comprehensive performance upgrade kit rather than just a basic maintenance component.

This UF617 kit is a comprehensive repair solution for those dealing with persistent engine misfires, rough idling, or stalling. By replacing the ignition coils and spark plugs simultaneously, it ensures that your engine’s firing system is firing at full capacity.

The components are engineered to meet or exceed original equipment specifications, providing a straightforward installation path that restores peak power output to your Infiniti G37.

Complete buying guide for Best Spark Plugs For G37

Why Iridium Matters

The G37’s 3.7L V6 engine is designed to run efficiently with iridium spark plugs. Unlike traditional copper or platinum options, iridium provides a much higher melting point and a smaller center electrode, which results in better ignition focus and extended service intervals of up to 100,000 miles.

Standalone Plugs vs. Coil Kits

If you are simply performing a routine tune-up, a set of six high-quality iridium plugs is sufficient. However, if your vehicle is struggling with engine misfires, rough idle, or poor power delivery, it is highly recommended to replace the ignition coil packs alongside the spark plugs to ensure a fresh, consistent electrical signal to each cylinder.

Checking Fitment

The Infiniti G37 has variations across its production years. Always verify your engine’s specific requirements using a fitment tool, as the thread reach, hex size, and gap specifications must match factory tolerances to prevent damage to the engine block or performance issues.

Frequently Asked Questions

How often should I change my G37 spark plugs?

For most iridium spark plugs recommended for the Infiniti G37, the recommended interval is between 80,000 and 100,000 miles under normal driving conditions.

Can I use a different gap size?

It is strongly advised to use the manufacturer-recommended gap, typically 0.044 inches. Deviating from this can lead to incomplete combustion, decreased fuel efficiency, and potential engine misfires.

Should I replace ignition coils at the same time?

While not always mandatory, replacing the coils along with the plugs is a proactive measure for vehicles with high mileage to ensure long-term reliability and solve potential ignition circuit issues.

Conclusion

Selecting the right spark plugs for your Infiniti G37 is a simple yet effective way to maintain engine health and performance. By choosing high-quality iridium options that meet OEM specifications, you can ensure that your engine remains responsive and fuel-efficient for thousands of miles to come.

Whether you prioritize the peace of mind that comes with original equipment from NGK or want a comprehensive performance kit to address ignition issues, these recommended products provide the reliability your Infiniti deserves.