Best Spark Plugs For 2010 Honda Accord

I remember when my 2010 Honda Accord started feeling sluggish—a slight hesitation on acceleration and a noticeable dip in gas mileage. It was time for new spark plugs. Choosing the right set is crucial for maximizing your Accord’s longevity and performance, especially given the difference between the 2.4L L4 and the 3.5L V6 engine options. This guide breaks down the top contenders we’ve tested to help you find the best spark plugs for your 2010 Honda Accord, ensuring reliable ignition and improved overall efficiency.

IMAGE	PRODUCT NAME	AMAZON LINK
	UF603 Ignition Coil & 97390 Double Iridium Spark Plug For…	View on Amazon
	4 pc NGK G-Power Spark Plugs compatible with Honda Accord…	View on Amazon
	4 pc NGK Laser Iridium Spark Plugs compatible with Honda…	View on Amazon
	NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix),…	View on Amazon
	Iridium Spark Plugs 4 Pack 5787 ILZKR7B-11S Fits for…	View on Amazon
	4 pc NGK Iridium IX Spark Plugs compatible with Honda…	View on Amazon
	Set of 4 Ignition Coil Pack and Spark Plugs Compatible…	View on Amazon
	6 pc NGK Iridium IX Spark Plugs compatible with Honda…	View on Amazon
	4 pc DENSO Iridium Power Spark Plugs compatible with…	View on Amazon
	Iridium Spark Plugs 4 Pack Compatible with Honda Accord…	View on Amazon

UF603 Ignition Coil & 97390 Double Iridium Spark Plug For HONDA 2008-2017 Accord Crosstour Odyssey, Acura 2009-2014 RI TI TSX TSX Replaces# 5C1681 52-2036 IC693 C1624

If you own the 3.5L V6 model and suspect your ignition coils might be nearing the end of their life, this combined kit is an excellent solution for a full ignition system refresh. This comprehensive package includes six double iridium spark plugs designed for maximum longevity (up to 100,000 kilometers) and six high-quality ignition coils. By replacing both components simultaneously, you address potential misfires caused by either worn plugs or weak coils, immediately restoring smooth engine idle and cold-start performance.

Key features that stand out:
– Full 6-pack kit: Includes both coils and plugs, perfect for the V6 engine.
– Double Iridium Spark Plug: Designed for an extended working life (up to 100,000 kilometers).
– High-quality ignition coil construction: Features stainless-steel springs and advanced thermoplastic connectors to resist thermal cycling.

Pros:
– Complete ignition system overhaul in one purchase.
– Excellent durability and long service interval due to double iridium design.
– Engineered to match or exceed OE design specifications.

Cons:
– Installation requires more time than just replacing the spark plugs alone.

Best for: V6 3.5L owners seeking a complete, high-durability ignition system replacement.

Expert Opinion: This set offers remarkable value for the V6 owner who wants long-term reliability without mixing and matching components. The double iridium plugs provide peace of mind regarding service life.

4 pc NGK G-Power Spark Plugs compatible with Honda Accord 2.4L L4 2008-2012

The NGK G-Power series offers a high-performance upgrade over standard nickel plugs, using a fine-wire platinum center electrode. These plugs are a fantastic, reliable choice for the 2.4L L4 engine, offering great ignition consistency without the high price tag of full iridium designs. If you need a quality replacement that improves throttle response and maintains excellent fuel economy without breaking the bank, G-Power is a highly respected choice from a brand Honda trusts.

Key features that stand out:
– Platinum construction: Provides better heat dissipation and durability compared to standard copper plugs.
– Genuine NGK Parts: Ensures high-quality and reliable fitment for the L4 engine.
– Improved throttle response: Fine-wire electrode design provides a more concentrated, consistent spark.

Pros:
– Exceptional value and affordability.
– Trusted OEM-quality brand fit for the 2.4L L4 engine.
– Reliable ignition performance.

Cons:
– Lifespan is shorter compared to double iridium options.

Best for: Budget-conscious 2.4L L4 owners looking for a significant performance upgrade over stock plugs.

Expert Opinion: NGK Platinum plugs are the standard bearer in reliability. They offer the necessary durability for the L4 engine’s demanding environment and are an easy win for anyone performing standard maintenance.

4 pc NGK Laser Iridium Spark Plugs compatible with Honda Accord 2.4L L4 2008-2012

When talking about top-tier, long-lasting performance for the 2010 Honda Accord 2.4L, the NGK Laser Iridium stands out. Designed specifically for advanced fuel-injected engines, these plugs feature a robust double precious metal construction—an Iridium center electrode and a Platinum ground electrode. This combination minimizes wear on both ends of the spark gap, making them ideal for high-heat, high-demand applications and providing the longest possible service life.

Key features that stand out:
– Double precious metal construction: Iridium center and Platinum ground for maximum wear resistance.
– Precision laser-welded electrode: Ensures gap consistency and stability throughout the life of the plug.
– Designed for advanced engines: Optimized for fuel efficiency and performance in modern L4 motors.

Pros:
– Longest lifespan available, often matching factory replacement intervals.
– Exceptional cold-start performance and stable idle.
– Optimal choice for maximizing fuel efficiency.

Cons:
– They are typically the most expensive option upfront.

Best for: 2.4L L4 owners who want the longest possible replacement interval and guaranteed OEM-level performance.

Expert Opinion: The Laser Iridium series is generally considered the gold standard for durability and stable ignition in Japanese four-cylinder engines. If you only want to replace your plugs once every 100k miles, this is the set to buy.

NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack

NGK’s Iridium IX line is aimed squarely at the performance enthusiast looking for improved throttle response and ignitability. Unlike the Laser Iridium, the IX uses a finer, tapered ground electrode to minimize quenching effects, focusing energy into a consistent, powerful spark. While these are single iridium plugs (meaning they might not last quite as long as the double iridium options), they offer superior ignition performance right out of the box, translating into a noticeable difference during aggressive driving.

Key features that stand out:
– 0.6mm laser welded fine Iridium tip: Ensures extreme ignitability and durability against heat.
– Tapered ground electrode: Minimizes electrical quenching for a stronger, more consistent spark.
– Trivalent Metal Plating: Provides superior anti-corrosion and anti-seizing properties, making future replacements easier.

Pros:
– Excellent choice for improved throttle response and engine feel.
– High resistance to fouling and electrical wear.
– Durable anti-seizing plating simplifies installation and removal.

Cons:
– Designed more for performance than maximum longevity.

Best for: 2.4L L4 owners prioritizing quick throttle response and robust power delivery.

Expert Opinion: These plugs are the enthusiasts’ choice. They ignite rapidly and consistently, offering a slight edge in power delivery over the ultra-long-life options, though you might consider checking them sooner than 100k miles.

Iridium Spark Plugs 4 Pack 5787 ILZKR7B-11S Fits for Honda Accord 2.4 2008 2009 2010 2011 2012, CRV 2010-2014, Civic Crosstour 2012 2013 2014 2015, Acura TSX 2009-2014, Acura ILX 2013-2015, L4 2.4L

This 4-pack of iridium spark plugs is specifically formulated as a direct replacement for several Honda and Acura L4 applications, including the 2010 Accord 2.4L. They emphasize fuel efficiency and engine stability by utilizing a 0.6mm fine-wire iridium center tip with advanced laser-welded technology. For those seeking reliable, quality plugs that directly meet OE specifications without the major brand markup, this set provides a fantastic balance of performance and cost.

Key features that stand out:
– Exceptional Fuel Efficiency: 0.6mm fine-wire design ensures maximum spark exposure and cleaner combustion.
– Direct OE Cross-Reference: Replaces common Honda/Acura OEM numbers (e.g., 12290R40A01).
– Rigorous Quality Testing: Focuses on eliminating common issues like misfiring, poor idling, and backfiring.

Pros:
– Excellent match for OEM performance standards.
– Strong focus on reducing fuel consumption.
– Budget-friendly iridium replacement option.

Cons:
– Brand recognition is lower than NGK or Denso.

Best for: 2.4L L4 owners seeking a highly-compatible, fuel-efficient iridium plug without paying premium brand prices.

Expert Opinion: Functionally, these plugs operate exactly as intended for the Accord’s 2.4L engine. The emphasis on quality control suggests they are a trustworthy, value-driven alternative to the major Japanese brands.

4 pc NGK Iridium IX Spark Plugs compatible with Honda Accord 2.4L L4 2008-2012

This is the standard Iridium IX pack for the four-cylinder 2010 Accord. As discussed above, the Iridium IX line is focused on providing sharp, intense ignition that translates into quick throttle response. They use high-durability iridium alloy, making them very resilient to the heat and electrical wear generated by the K24 engine. This set is a dependable choice for those who value improved daily drivability and quick engine revving characteristics.

Key features that stand out:
– Genuine NGK Parts: Guaranteed fitment and quality for the 2.4L L4 2010 Accord.
– Enhanced Ignitability: Superior spark delivery for quicker starts and smoother operation.
– Direct replacement auto parts: Simple, straightforward installation process.

Pros:
– Noticeable improvement in throttle response.
– Reliable durability from a leading OEM supplier.
– Standard four-pack is convenient for L4 owners.

Cons:
– Not as long-lasting as the Laser Iridium double platinum/iridium combination.

Best for: Daily drivers of the 2.4L L4 who want reliable ignition with a performance edge.

Expert Opinion: The standard NGK Iridium IX is a proven winner. It strikes a good balance between the long life of Laser Iridium and the performance focus of specialized racing plugs.

Set of 4 Ignition Coil Pack and Spark Plugs Compatible with 2.4L L4 Honda Accord Civic CRV Crosstour, Compatible with Acura ILX 2008 2009 2010 2011 2012 2013 2014 2015, Relapces UF602 IC692

Similar to the V6 combined kit, this set offers a comprehensive ignition overhaul specifically for the 2.4L L4 Accord, featuring four plugs and four coil packs. If your 2010 Accord is pushing high mileage and you’re experiencing intermittent misfires that could be traced back to aging coils, this kit is highly convenient. The components are made from durable copper windings and ceramic insulators designed to withstand harsh conditions and deliver stable, consistent high-voltage output for improved fuel combustion.

Key features that stand out:
– Complete L4 kit: Includes 4 ignition coils and spark plugs.
– Superior Performance: Enhances ignition efficiency and engine power output.
– High-quality materials: Robust copper windings and ceramic insulator for temperature resistance.

Pros:
– Eliminates guesswork by replacing coils and plugs simultaneously.
– Easy, direct installation without special tools.
– Improves overall fuel combustion efficiency.

Cons:
– Spark plug material (not specified as Iridium) might suggest a shorter lifespan than premium options.

Best for: 2.4L L4 owners with high mileage seeking to address both coils and plugs in a single, convenient repair.

Expert Opinion: For an older car, sometimes a system refresh is better than just a component swap. This kit provides that refresh, guaranteeing better efficiency if your original coils are weak.

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

V6 owners who only need to replace their spark plugs (not the coils) will find this 6-pack of NGK Iridium IX plugs ideal. Just like their four-cylinder counterparts, these plugs offer high durability and excellent ignitability, providing reliable startup and smooth acceleration for the 3.5L V6 engine. NGK specifically designed this size and heat range for the Accord V6, ensuring they handle the demanding temperature cycles of the larger motor.

Key features that stand out:
– 6-pack configuration: Perfectly sized for the 3.5L V6 2010 Accord.
– Genuine NGK Iridium IX: Performance-focused, highly durable single-iridium design.
– Broad compatibility: Fits a wide range of V6 Accords (2008-2017).

Pros:
– Optimized spark intensity for the V6 motor.
– Long-lasting performance and durability.
– Trusted OEM brand quality and fitment.

Cons:
– Single iridium tip means they might require replacement slightly sooner than double iridium.

Best for: 3.5L V6 owners who only need plug replacement and prioritize performance and brand recognition.

Expert Opinion: NGK Iridium is a dependable option for V6 motors, especially since changing the rear bank plugs on a V6 Accord can be challenging—you want a plug that won’t need to be touched again for a very long time.

4 pc DENSO Iridium Power Spark Plugs compatible with Honda Accord 2.4L L4 2008-2012

DENSO is another key OEM supplier for Honda, and their Iridium Power line is engineered for maximum performance. These plugs boast an incredibly thin 0.4mm iridium tip coupled with their unique U-Groove ground electrode. This design maximizes the size and intensity of the spark, which DENSO claims translates directly into more power and superior fuel economy than competitors. If you’re chasing peak engine output from your 2.4L, DENSO Iridium Power is a powerful option.

Key features that stand out:
– 0.4mm Iridium Tip: Extremely fine tip for maximum spark energy delivery.
– Tapered Cut, U-Groove Ground Electrode: Unique design that encourages superior combustion.
– Maximum Performance: Designed to withstand temperatures exceeding 4000 degrees.

Pros:
– Designed for power sports applications, offering maximum spark efficiency.
– Trusted OE quality from a major Japanese supplier.
– Superior heat resistance.

Cons:
– The ultra-fine tip may not offer the extreme longevity of double iridium options.

Best for: 2.4L L4 drivers prioritizing outright performance, quicker starts, and maximum combustion efficiency.

Expert Opinion: The DENSO Iridium Power plugs are known for delivering a tangible performance boost. They are a strong competitor to the NGK Iridium IX, often preferred by those who want the sharpest engine feel.

Iridium Spark Plugs 4 Pack Compatible with Honda Accord 2008-2012, Civic CR-V 2012-2015, Kia Soul/Optima/Sportage/Forte/Sorento 2014-2018, Hyundai Elantra/Sonata/Santa Fe/Tucson – L4 2.0L & 2.4L

This versatile 4-pack of iridium plugs provides a solid replacement option for the 2.4L L4 Accord, emphasizing long-term durability and efficiency. Featuring a 0.6mm fine-wire iridium center electrode, they offer reliability comparable to OEM parts. The major benefit here is the robust material quality; Iridium alloy boasts six times the hardness of platinum, ensuring it resists electrical wear and heat damage, making it ideal for standard driving conditions.

Key features that stand out:
– Premium Iridium Material: Six times harder than platinum for enhanced durability.
– 0.6mm Finewire Electrode: Promotes clean, efficient combustion and fuel savings.
– Wide Fitment: Compatible with many 2.4L L4 engines across Honda/Acura and other brands.

Pros:
– High durability and extended lifespan.
– Reduces fuel consumption through efficient combustion.
– Affordable iridium replacement.

Cons:
– The broad vehicle fitment may concern some seeking a Honda-specific application.

Best for: 2.4L L4 owners looking for a highly durable, cost-effective replacement that guarantees efficient engine operation.

Expert Opinion: While covering many makes, these plugs hit the essential criteria for the 2010 Accord: iridium durability, fine-wire design, and reliable performance. They are a great middle-ground choice.

Comparison Short Insights

When evaluating the best spark plugs for your 2010 Honda Accord, the first thing you need to identify is your engine type: the 2.4L L4 (needs 4 plugs) or the 3.5L V6 (needs 6 plugs).

For maximum longevity in the L4 engine, the NGK Laser Iridium stands out. Its double precious metal design means you are getting the closest thing to “install and forget” performance, often lasting 100,000 miles or more.

If you prioritize a slight performance edge and sharper throttle response in your L4, look towards the NGK Iridium IX or the DENSO Iridium Power plugs. The DENSO 0.4mm tip often provides the most intense spark.

V6 owners have the extra consideration of accessibility; since changing the rear plugs is difficult, investing in double iridium plugs or a high-quality Iridium IX set (like the 6 pc NGK Iridium IX) is strongly recommended to minimize future maintenance hassles.

Finally, if your Accord is high mileage and idling poorly, a combined plug and coil pack kit (available for both L4 and V6) might be your smartest investment to refresh the entire ignition system at once.

Final Verdict

Choosing the right spark plug depends heavily on whether you prioritize maximum life, budget, or performance.

For the 2.4L L4 Engine (Durability & OEM Replacement): The 4 pc NGK Laser Iridium Spark Plugs are the undisputed winner for longevity and proven reliability, offering the best overall life cycle value.

For the 3.5L V6 Engine (Best Plug Only Option): The 6 pc NGK Iridium IX Spark Plugs provides the trusted NGK durability and performance necessary for the demanding V6, ensuring smooth operation between maintenance cycles.

Best High-Mileage Overhaul: If you own the V6 and suspect aging coils, the UF603 Ignition Coil & 97390 Double Iridium Spark Plug bundle is the most efficient and effective way to completely reset your ignition system reliability.

Best Spark Plugs For 2010 Honda Accord FAQ

What type of spark plugs are recommended for the 2010 Honda Accord?

Honda recommends using iridium spark plugs for both the 2.4L L4 and the 3.5L V6 engines in the 2010 Accord. Iridium provides superior heat resistance and wear characteristics, ensuring stable ignition and a long service life, typically 60,000 to 100,000 miles. Options like NGK Iridium IX or DENSO Iridium Power are popular choices due to their reliability.

How often should I replace the spark plugs in my 2010 Accord?

The typical replacement interval for OEM or equivalent iridium spark plugs in the 2010 Honda Accord is between 100,000 to 105,000 miles. However, if you notice symptoms like rough idling, engine misfires, poor acceleration, or decreased gas mileage, they should be inspected and potentially replaced sooner.

Do the 2.4L L4 and 3.5L V6 models use different spark plugs?

Yes, they use different quantities and often different heat ranges and gap specifications, though both typically require high-quality iridium plugs. The L4 engine requires four spark plugs, while the V6 engine requires six spark plugs. Always confirm the specific part number (like NGK or DENSO codes) to ensure proper fitment for your exact engine.

What is the correct spark plug gap for the 2010 Honda Accord?

While the precise gap can vary slightly depending on the specific plug brand and part number, the factory gap specification for the 2010 Honda Accord is generally around 0.044 inches (1.1 mm). It’s always critical to confirm the required gap with the specific spark plug manufacturer or against the information found on the emissions label under your car’s hood.

Should I replace my ignition coils when I replace the spark plugs?

It is generally not necessary to replace ignition coils every time you change the spark plugs, especially with a lower-mileage car. However, if your 2010 Accord has high mileage (over 150,000 miles) or if you are experiencing persistent engine misfires or rough running, replacing the coil packs along with the 2010 Honda Accord spark plugs is a smart preventative measure, particularly on the V6 engine where coil replacement is difficult.

What are the signs that my current spark plugs are failing?

Common symptoms of failing spark plugs include engine misfiring (a noticeable shake or shudder, often during acceleration), difficulty starting the car, a noticeable decrease in fuel efficiency, and the illumination of the Check Engine Light (often reporting a cylinder misfire code). Replacing your ignition system components quickly when these symptoms appear can prevent damage to other engine parts.