Best Spark Plugs For 2008 Honda Accord V6

When I first bought my 2008 Honda Accord V6, I knew the 3.5L J-series engine was a workhorse, but keeping it running smoothly requires great maintenance. For anyone nearing the 100,000-mile mark, replacing the spark plugs for the 2008 Honda Accord V6 is essential for maintaining optimal engine performance and excellent fuel economy. After digging into the different material types and brands, I’ve compiled this guide to help you choose the very best option—whether you’re prioritizing longevity, performance, or budget.

IMAGE	PRODUCT NAME	AMAZON LINK
	6 pc NGK G-Power Spark Plugs compatible with Honda Accord…	View on Amazon
	6 pc NGK Iridium IX Spark Plugs compatible with Honda…	View on Amazon
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	6 pc DENSO Iridium Power Spark Plugs compatible with…	View on Amazon
	6 pc NGK Laser Iridium Spark Plugs compatible with Honda…	View on Amazon
	Iridium Spark Plugs 6 Pack 93175 LKR7DIX-11S Fit for…	View on Amazon
	Iridium Spark Plugs 6 Pack 6994 Compatible with Honda…	View on Amazon

6 pc NGK G-Power Spark Plugs compatible with Honda Accord 3.5L V6 2008-2017

If you’re looking for a reliable, step-up option that offers excellent performance without the high price tag of double iridium, the NGK G-Power series is a fantastic choice. These use fine-wire platinum on the center electrode, which significantly improves ignitability and provides better durability than traditional copper plugs. They are a direct-fit replacement and are known for improving cold starts and smoothing out rough idling in the J35 V6 engine.

Key features that stand out:

• Single Platinum Tip: Offers better lifespan and ignition reliability than standard plugs.
• Genuine NGK Parts: Assures high quality and compatibility with the Honda Accord 3.5L V6.
• Superior Anti-Corrosion: Features NGK’s Trivalent Metal Plating.

Pros:
– Excellent value for a platinum plug upgrade.
– Noticeable improvement in idle quality.
– Reliable performance from an OEM supplier (NGK).

Cons:
– Shorter replacement interval compared to double Iridium plugs.

Best for: Budget-conscious owners seeking a significant upgrade over factory copper plugs.

Expert Opinion: While not the highest mileage plug NGK offers, the G-Power is a highly dependable platinum option. It’s perfect for the driver who handles their own frequent maintenance and wants better response than standard equipment provides.

6 pc NGK Iridium IX Spark Plugs compatible with Honda Accord 3.5L V6 2008-2017

The NGK Iridium IX line is designed specifically for enthusiasts looking for optimized performance and improved responsiveness. This line utilizes a fine-wire Iridium tip that allows for a consistently strong, concentrated spark, leading to cleaner combustion. These plugs are often credited with sharper throttle response and improved horsepower, making them a popular choice among those who enjoy the spirited nature of the Accord V6.

Key features that stand out:

• Fine Wire Iridium Tip: Extremely durable and provides superior sparking characteristics.
• Improved Throttle Response: Designed for maximum performance over ultimate longevity.
• OEM Compatibility: Guaranteed fitment for the 2008-2017 3.5L V6 models.

Pros:
– Enhanced engine performance and acceleration.
– Exceptional durability against heat and erosion.
– Genuine NGK quality assurance.

Cons:
– Not designed for the 100,000+ mile service interval of the Laser Iridium line.

Best for: Drivers prioritizing performance and maximum ignition efficiency.

Expert Opinion: The Iridium IX is the performance cousin to the long-life plugs. You get a slightly hotter, more reliable spark, which is great for high-load driving, though you might replace them a little sooner than the double precious metal versions.

A-Premium Iridium Platinum Spark Plugs Compatible with Honda Accord 2003-2007 & Acura MDX 2007-2009, TL 2004-2008, RL 2005-2008, 3.0L 3.2L 3.5L 3.7L, Pack of 6

A-Premium offers a high-quality, aftermarket Iridium Platinum blend designed to provide great longevity and stability. These plugs are engineered to maximize ignition performance and are recommended for replacement intervals between 80,000 to 100,000 miles, similar to OEM specifications for long-life plugs. The combination of Iridium (center) and Platinum (ground) electrodes ensures resistance against wear and heat.

Key features that stand out:

• Iridium Platinum Construction: Provides excellent heat resistance and long service life.
• Engineered for Longevity: Recommended replacement interval of up to 100,000 miles.
• High Resistance: Rated at 5000 ohms for stable electrical performance.

Pros:
– Competitive price point for premium materials.
– Excellent resistance to fouling and wear.
– Reliable long-term performance.

Cons:
– Fitment chart is primarily geared toward the previous generation V6 (3.0L) Accord.

Best for: Value seekers who want long-life Iridium/Platinum materials but must confirm the exact fitment.

Expert Opinion: Be highly cautious about fitment here. While the material composition is excellent for longevity, the compatibility notes strongly emphasize the 2003-2007 3.0L Accord. For the 2008 Honda Accord V6 3.5L, you need to ensure the gap size and thread reach match the specific OEM plug (often NGK DILZKR7B11GS or equivalent).

6 pc DENSO Iridium Power Spark Plugs compatible with Honda Accord 3.5L V6 2008-2016

DENSO is another massive name in the OEM world, and their Iridium Power series stands up well against NGK’s performance lines. These plugs are known for their extremely thin Iridium center electrode, which dramatically reduces the voltage required to create a spark. This results in fewer misfires, better cold-start reliability, and superior overall combustion efficiency, directly benefiting your fuel economy.

Key features that stand out:

• Patented DENSO Design: Unique ground electrode geometry for a larger spark nucleus.
• Reduced Emissions and Misfires: Promotes complete fuel ignition in the combustion chamber.
• Trusted Quality: DENSO is a multi-award-winning supplier recognized globally.

Pros:
– Excellent ignition stability and efficiency.
– Highly effective at reducing soot buildup and erratic starts.
– Premium, high-quality OEM competitor.

Cons:
– Can be more costly than standard platinum options.

Best for: Anyone seeking maximum engine efficiency and starting reliability from a world-class OEM supplier.

Expert Opinion: Denso’s commitment to quality is evident in the Iridium Power line. They are an excellent alternative to NGK, offering exceptional heat resistance and durability, perfect for maintaining the integrity of the complex J-series engine.

6 pc NGK Laser Iridium Spark Plugs compatible with Honda Accord 3.5L V6 2008-2017

This is often considered the gold standard for the 2008 Accord V6. The NGK Laser Iridium plugs feature double precious metal construction: a fine-wire Iridium center electrode and a Platinum ground electrode. This design is engineered specifically to meet the stringent demands and extended service intervals (often 105,000 miles) required by modern Honda engines. If you want true OEM longevity and peace of mind, this is the plug to choose.

Key features that stand out:

• Double Precious Metal Construction: Iridium center and Platinum ground for maximum durability.
• Trivalent Metal Plating: Provides superior anti-seizing and anti-corrosion properties crucial for removal after long service life.
• Designed for Advanced Engines: Ideal for modern fuel-injected V6 setups.

Pros:
– True OEM replacement plug for maximum longevity.
– Reliable 100,000+ mile service life.
– Best overall fitment and performance assurance.

Cons:
– Highest price point among the NGK options reviewed.

Best for: The owner who wants OEM-specified longevity and requires the longest possible maintenance interval.

Expert Opinion: For the 2008 Accord V6, the Laser Iridium is the factory recommended plug. You simply can’t beat the durability and reliability these provide over the long haul. If budget allows, this should be your default choice.

Iridium Spark Plugs 6 Pack 93175 LKR7DIX-11S Fit for 2008-2017 Honda Accord 3.5 Odyssey Pilot,Jeep Grand Cherokee 3.6 Wrangler Dodge Charger Durango Journey,Kia Sedona Sorento,Chrysler Town & Country

This multi-fitment Iridium spark plug pack offers a great balance of modern technology and competitive pricing. Utilizing a 0.6mm fine-wire Iridium center tip and advanced laser welding, these plugs are optimized for high energy transfer and exceptional fuel efficiency. While they fit a wide array of vehicles, the specific fitment for the 2008 Honda Accord 3.5L V6 is confirmed, making them an attractive alternative to the more expensive OEM branded options.

Key features that stand out:

• Exceptional Fuel Efficiency: 0.6mm fine-wire Iridium tip maximizes combustion efficiency.
• Wide Vehicle Fitment: Compatible across multiple V6 platforms (Honda, Jeep, Dodge, Kia).
• Direct Replacement: Features corresponding reference numbers (93175, LKR7DIX-11S).

Pros:
– Highly cost-effective Iridium solution.
– Modern laser welded technology for durability.
– Confirmed fitment for the 2008-2017 3.5L V6.

Cons:
– Longevity may not perfectly match proprietary OEM designs.

Best for: The budget-savvy buyer seeking genuine Iridium technology and confirmed compatibility.

Expert Opinion: This is a strong, affordable competitor in the Iridium market. Because the 2008 Accord V6 engine is robust, a high-quality aftermarket Iridium plug like this will provide years of reliable service and excellent fuel economy.

Iridium Spark Plugs 6 Pack 6994 Compatible with Honda Accord V6 3.0 2003 2004 2005 2006 2007, Acura TL 3.2L 2004-2008, RL 3.5L 2005-2008, MDX 3.7L 2007-2009 Replaces IZFR6K11, 9807B-561BW

This 6-pack of Iridium plugs utilizes high-durability materials designed to withstand the heat and electrical strain of high-performance engines. The Iridium fine wire center electrode is noted for being six times harder than platinum, ensuring exceptional resistance to wear. Like other high-end options, these are marketed for superior fuel efficiency through precise, focused spark delivery.

Key features that stand out:

• Premium Material: Iridium fine wire center electrode for enhanced durability.
• Superior Wear Resistance: Extremely high melting point resists heat and electrical erosion.
• Exceptional Fuel Efficiency: Fine-wire design maximizes combustion.

Pros:
– Strong material composition for longevity.
– Includes a 12-month warranty.
– Very competitive pricing for Iridium materials.

Cons:
– Fitment chart focuses almost exclusively on the previous generation (3.0L) Accord.

Best for: Those upgrading a previous generation Accord V6 (2003–2007).

Expert Opinion: Much like product 3, this specific reference number (6994, IZFR6K-11) is generally associated with the 3.0L V6 used in the 7th generation Accord. Installing the wrong plug type, even if the material is premium, can lead to misfires or even engine damage in your 2008 Honda Accord 3.5L V6. Verify the exact Honda OEM part number required before purchasing this product.

Comparison Insights for Your 2008 Honda Accord V6

When deciding between these options, the main choice comes down to material and expected maintenance interval.

If your goal is to match the original equipment manufacturer (OEM) longevity, the NGK Laser Iridium is the clear winner. This plug is specifically engineered for the 100,000-mile replacement schedule of the J35 engine.

For those who want slightly better performance gains and don’t mind a potentially shorter service life (say, 60k-80k miles), the NGK Iridium IX or the DENSO Iridium Power are excellent, responsive choices. They offer fantastic ignition stability.

If you are looking for a more budget-friendly solution, the NGK G-Power (Platinum) provides a solid step up from basic plugs and reliable performance at a significantly lower cost, though expect to change them closer to 50,000 miles.

Crucially, always double-check the exact part number for your 2008 3.5L V6 (often DILZKR7B11GS or equivalent) if buying aftermarket plugs that reference older 3.0L models.

Final Verdict: Choosing the Right Spark Plug

When maintaining the legendary reliability of your 2008 Accord V6, the best plug depends entirely on what you prioritize:

The Gold Standard (Best Longevity): Go with the 6 pc NGK Laser Iridium Spark Plugs. These are the factory equivalent parts designed to run flawlessly for over 100,000 miles, making them the superior choice for high-mileage drivers.

The Performance Upgrade (Best Responsiveness): We recommend the 6 pc NGK Iridium IX Spark Plugs. They provide exceptional ignitability, ensuring the V6 engine stays quick and smooth, especially when accelerating onto the highway.

The Best Value Option (Budget-Friendly Iridium): If you want Iridium technology without the premium OEM price tag, the Iridium Spark Plugs 6 Pack 93175 provides modern performance and great fuel efficiency at a fraction of the cost.

Best Spark Plugs For 2008 Honda Accord V6 FAQ

Q1: What is the recommended replacement interval for spark plugs in the 2008 Honda Accord V6?

Honda generally recommends replacing the original equipment spark plugs (usually NGK Laser Iridium or DENSO equivalent) at the 105,000-mile service interval. If you install lower-grade plugs (like platinum or copper), the replacement interval will be significantly shorter, potentially 50,000 to 60,000 miles. Always check the specific recommendations for the plug type you install.

Q2: Is Iridium really worth the extra cost over Platinum spark plugs?

Yes, especially for the 2008 Honda Accord 3.5L V6. Iridium is far harder and has a higher melting point than platinum, allowing for much finer center electrodes. This results in a more efficient spark and significantly greater durability, meaning you get the benefit of a 100,000+ mile service life and better long-term reliability.

Q3: What happens if I don’t replace my spark plugs?

Ignoring spark plug replacement can lead to several problems, including rough idling, engine misfires (which can cause your “Check Engine Light” to flash), reduced engine power, and poor fuel economy. In severe cases, constant misfires can damage expensive components like the catalytic converter.

Q4: Does spark plug material affect the VCM (Variable Cylinder Management) system?

While the spark plugs themselves don’t directly control the VCM system on the 2008 Honda Accord V6, the VCM requires the engine to run perfectly to transition smoothly between 3 and 6 cylinders. Using high-quality Iridium spark plugs ensures consistent combustion, which helps the VCM operate efficiently and prevents hesitation or vibration during cylinder deactivation.

Q5: Do these plugs come pre-gapped, and should I check the gap?

Most premium Iridium and Platinum plugs are sold pre-gapped for the specific application, usually set at 0.044 inches for the 2008 V6 engine. However, it’s always smart practice to gently check the gap upon arrival using a wire-style feeler gauge, as improper handling during shipping can sometimes alter the gap. Never try to adjust the gap drastically on fine-wire Iridium plugs, as you risk damaging the delicate electrode tip.

Q6: Should I replace my ignition coil packs at the same time as the spark plugs?

It’s highly recommended to inspect the coil packs (or coil-on-plug units) when performing the spark plug replacement. If your Accord is approaching 150,000 miles, the coil packs may be nearing the end of their useful life. Replacing worn coils at the same time as the plugs can save you the labor of having to disassemble the intake manifold a second time later on.