The Infiniti G37 packs strong performance, quick acceleration, and a refined driving experience. Spark plugs play a major role in keeping that V6 engine responsive and efficient. A quality set of spark plugs helps improve ignition, supports smoother engine operation, and promotes better fuel economy. Old or worn plugs can cause rough idling, slower throttle response, engine misfires, and reduced power output.
Many G37 owners replace spark plugs to restore factory performance or prepare their vehicles for high-mileage driving. Several options on the market promise reliability, durability, and consistent spark delivery, but not every product meets the needs of the Infiniti G37 engine. Material quality, lifespan, heat range, and compatibility all matter before making a purchase.
This guide highlights the 5 best spark plugs for Infiniti G37 based on performance, durability, value, and owner satisfaction. Each option offers unique benefits that can help keep your engine running smoothly for miles to come.
5 Best Spark Plugs For Infiniti G37
| Image | Title | Best For | Link |
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NGK Laser Iridium Spark Plugs | The 6-piece ngk laser iridium spark plug set for 2008-2013 infiniti g37 3.7l v6 engine upgrade… more | View on Amazon |
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NGK 90174 Laser Iridium Plugs | The ngk 90174 laser iridium spark plugs 6-pack compatible with infiniti 3.7l and nissan 370z mo… more | View on Amazon |
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Dragon Fire Ignition Coil Kit | The dragon fire performance ignition coil and iridium spark plug kit for infiniti 3.7l v6 engin… more | View on Amazon |
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KAX Ignition Coil Spark Plug Set | The kax 6-pack ignition coils and double iridium spark plugs for infiniti and nissan 3.7l engin… more | View on Amazon |
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A-Premium Double Iridium Spark Plugs | The a-premium double iridium spark plugs 6-pack compatible with infiniti and nissan 3.7l v6 mod… more | View on Amazon |
Our Top 5 Best Spark Plugs For Infiniti G37 Reviews – Expert Tested & Recommended
1. 6-Piece NGK Laser Iridium Spark Plug Set
This 6-piece set is specifically designed for the G37, offering the reliability and performance that enthusiasts expect from the NGK brand. It serves as a perfect direct replacement to get your V6 engine running smoothly again.
Key Features That Stand Out
- ✓ High-grade iridium center electrode for extreme durability
- ✓ Consistent spark delivery across all cylinders
- ✓ Designed specifically for 3.7L V6 performance
- ✓ Comes as a complete 6-piece set for full engine coverage
Why We Recommend It
We recommend these plugs because they provide an ideal balance between price and factory-level performance. They are incredibly reliable and help restore lost power, making your daily commute feel like new.
Best For
Best for drivers who want a dependable, OEM-quality replacement for their daily driver.
Pros and Cons at a Glance
2. NGK 90174 Laser Iridium Spark Plugs
If you want the exact plug that came with your vehicle from the factory, this is the one. NGK is a world leader in OE spark plug manufacturing, and these 90174 plugs provide the longevity and performance the 3.7L V6 engine demands.
Key Features That Stand Out
- ✓ Genuine OEM quality and performance standards
- ✓ Iridium tip for incredible service life
- ✓ Highly resistant to electrical erosion
- ✓ Excellent compatibility with Nissan and Infiniti 3.7L engines
Why We Recommend It
We recommend these because you simply cannot beat OEM quality. When you install these, you have the peace of mind knowing your ignition system is running exactly as the engineers intended.
Best For
Best for the meticulous owner who prefers original equipment manufacturer parts for maintenance.
Pros and Cons at a Glance
3. Dragon Fire Performance Ignition Coil and Plug Kit
If your G37 is showing signs of a misfire, a simple plug change might not be enough. This kit includes both new ignition coils and iridium plugs, offering a comprehensive ignition overhaul at an incredible value.
Key Features That Stand Out
- ✓ Bundle deal including 6 coils and 6 plugs
- ✓ Designed for increased ignition power (up to 15% more)
- ✓ Plug-and-play installation for DIY enthusiasts
- ✓ Built for durability in high-heat engine environments
Why We Recommend It
We recommend this kit for those dealing with multiple misfires. Replacing the coils and plugs at the same time is standard practice for the best results, and this kit saves you the hassle of shopping for them individually.
Best For
Best for budget-conscious owners who need to address both coil and spark plug issues simultaneously.
Pros and Cons at a Glance
4. KAX Ignition Coil Spark Plug Set
KAX provides a high-voltage solution that ensures reliable engine starts. With double iridium spark plugs and high-performance coils, this kit is engineered for long-term consistency and efficiency.
Key Features That Stand Out
- ✓ Rapid 0.1-0.2 second ignition response
- ✓ High-voltage output for stable engine performance
- ✓ Precision-engineered for a direct OEM fit
- ✓ Durable materials designed for high-stress driving
Why We Recommend It
We recommend this for owners who experience slow starts or intermittent power loss. The upgraded coil technology ensures that the spark is as strong as it needs to be, regardless of load.
Best For
Best for those looking to resolve ignition-related issues with a high-performance, all-in-one upgrade.
Pros and Cons at a Glance
5. A-Premium Double Iridium Spark Plugs
A-Premium offers a solid aftermarket option for those wanting double iridium technology. These plugs are built for longevity and consistent operation in high-performance engines like the Infiniti G37.
Key Features That Stand Out
- ✓ Double iridium construction for optimal lifespan
- ✓ Standard 0.044 inch gap for easy installation
- ✓ Excellent electrical resistance to protect electronics
- ✓ Precise fit for various Infiniti 3.7L models
Why We Recommend It
We recommend these for the driver looking for a reliable, cost-effective maintenance part. They offer double iridium durability at a price point that makes it easier to keep up with your vehicle’s service intervals.
Best For
Best for DIY maintenance where durability and cost-effectiveness are top priorities.
Pros and Cons at a Glance
Complete Buying Guide for Best Spark Plugs For Infiniti G37
Essential Factors We Consider
When searching for the best spark plugs for Infiniti G37, we prioritize material quality, heat range, and specific OEM requirements. Iridium is the standard because it resists corrosion and high-heat wear better than copper or platinum. You should also ensure the gap is set to the manufacturer’s specification, usually around 0.044 inches, to keep your G37 running optimally.
Budget Planning
It is worth noting that while you can find bargain options, spark plugs are critical components. Saving a few dollars now is usually not worth the risk of a misfire or potential damage to your ignition coils. Sticking to proven, high-quality brands like NGK or reputable performance kits will save you more money in the long run by preventing extra labor or repairs.
Final Thoughts
Your G37 is a high-revving performance machine, and it needs a clean spark to maintain that feeling. Whether you choose the factory-recommended NGK plugs or a full ignition kit to fix a rough idle, upgrading your ignition system is one of the most rewarding maintenance tasks you can perform yourself.
Frequently Asked Questions
Q: How often should I replace my Infiniti G37 spark plugs?
A: Most manufacturers recommend checking them around every 60,000 to 100,000 miles. However, if you notice engine hesitation, rough idling, or decreased fuel economy, it is smart to check them sooner.
Q: Can I install these spark plugs myself?
A: Yes, many G37 owners perform this task at home. It requires basic tools, but take your time, as the spark plug ports are deep and require a specialized spark plug socket and extension to reach comfortably.
Q: Why is iridium preferred over other materials?
A: Iridium is incredibly hard and has a very high melting point, allowing the spark plug tip to be much finer. This creates a stronger, more consistent spark while lasting significantly longer than copper-based alternatives.