Best Spark Plugs For 2012 Honda Accord

I recently decided it was time to refresh the ignition system on my own 2012 Honda Accord, and immediately noticed the difference a quality set of spark plugs makes. Finding the right spark plugs for the 2.4L L4 or 3.5L V6 engine is crucial for maintaining that classic Honda reliability and maximizing your fuel efficiency. I’ve put together a detailed look at the top contenders to help you choose the best spark plugs for 2012 Honda Accord without guessing.

IMAGE	PRODUCT NAME	AMAZON LINK
	NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix),…	View on Amazon
	4 pc DENSO Iridium Power Spark Plugs compatible with…	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
	UF603 Ignition Coil & 97390 Double Iridium Spark Plug For…	View on Amazon

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

If you drive your 2012 Accord enthusiastically and want the sharpest response, the NGK Iridium IX line is often considered the gold standard. These plugs are built for performance, utilizing an extremely fine Iridium tip that guarantees robust, consistent ignition even under high load. Installing these plugs can genuinely help improve throttle response and stabilize idle, providing a noticeable upgrade over standard copper or platinum plugs. They also feature NGK’s proprietary Trivalent Metal Plating for superb defense against corrosion and seizing, which makes future changes much easier.

Key features that stand out:
– 0.6 millimeter laser welded fine Iridium tip ensures high durability and a stable spark.
– Tapered ground electrode minimizes the electrical quenching effect, maximizing spark energy.
– Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties.
– Corrugated ribs on the insulator prevent flashover and premature failure.

Pros:
– Excellent performance and throttle response improvement.
– High durability and resistance to wear due to Iridium alloy.
– Reliable anti-seizing properties.

Cons:
– May be slightly more expensive than standard OEM-equivalent plugs.

Best for: The performance-oriented driver looking for maximum ignitability and responsiveness.

Expert Opinion: NGK Iridium IX plugs are trusted by mechanics globally for their reliability and engineering quality. While designed for enthusiasts, they offer great long-term value thanks to their extreme durability.

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

DENSO is another key player in the OEM world, and their Iridium Power series is designed specifically to deliver maximum performance and fuel economy. This 4-pack is a direct replacement for the Honda Accord 2.4L L4 models from 2008 through 2012, ensuring perfect fitment. The core benefit here is the 0.4mm iridium tip, one of the smallest available, which requires less voltage to fire. This translates into a stronger spark, better combustion, and consequently, superior fuel economy.

Key features that stand out:
– 0.4mm iridium tip provides maximum performance and superior fuel economy.
– Tapered cut, U-Groove ground electrode enhances spark delivery.
– Genuine DENSO parts ensuring factory-level quality and reliability.
– Designed to withstand temperatures greater than 4000 degrees.

Pros:
– Direct OEM quality fitment for L4 models.
– Exceptional focus on both power and efficiency.
– Extremely fine tip enhances ignitability.

Cons:
– The focus on power means the lifespan might be slightly shorter than some ultra-long-life double Iridium plugs.

Best for: Owners of the 2.4L L4 model prioritizing a blend of performance gains and efficiency improvements.

Expert Opinion: DENSO’s commitment to precision engineering makes these a top-tier choice. The fine 0.4mm tip is crucial for those demanding a clean, powerful burn from their engine.

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, L4 2.4L

This 4-pack of Iridium plugs offers a high-quality, cost-effective solution specifically designed to replace the OEM part numbers for the 2.4L L4 Honda Accord. If you are dealing with common ignition issues like rough idling, misfires, or poor fuel economy, these plugs are engineered to restore stability and reliability. They use advanced laser welding technology on the 0.6mm fine-wire iridium center electrode, maximizing the spark performance while keeping fuel consumption low—a key feature for daily drivers.

Key features that stand out:
– Direct cross-reference for OE part numbers like ILZKR7B-11S (5787).
– 0.6mm finewire iridium centerwire tip design ensures efficient combustion.
– Designed to mitigate issues like backfiring, stalling, and engine shaking.
– Includes a 12-month warranty for peace of mind.

Pros:
– Excellent value for the price point.
– Specifically targets restoration of stable engine performance.
– Direct fitment compatibility with the 2.4L engine.

Cons:
– Brand recognition is lower compared to NGK or DENSO.

Best for: Budget-conscious owners needing an OEM-spec replacement for their 2.4L Accord to resolve poor running conditions.

Expert Opinion: While not a “name brand” per se, these plugs meet the strict design criteria needed for the sophisticated Honda L4 engine, offering comparable performance to OE plugs at a competitive price.

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

This listing provides the same exceptional quality of the NGK Iridium IX line but clearly specifies the fitment for the 2.4L L4 2012 Honda Accord. When you buy NGK, you are getting genuine parts that are engineered with incredible precision. These plugs use the durable Iridium material to ensure a long service life, often exceeding 80,000 miles, making them ideal for standard maintenance schedules. They are a simple, reliable direct replacement that restores factory-fresh ignition performance.

Key features that stand out:
– Genuine NGK Parts ensuring consistent quality and performance.
– Direct replacement for the 2.4L L4 Accord engines (2008-2012).
– Designed for long service life and reliability.
– Packaged with original hardware for easy installation.

Pros:
– Industry-leading quality from a trusted OEM supplier.
– Exceptional durability suitable for extended change intervals.
– Guaranteed vehicle fitment compatibility.

Cons:
– Primarily focused on longevity, not specialized for extreme performance modifications.

Best for: The owner who wants the best balance of longevity, reliability, and guaranteed quality for their 2.4L L4 engine.

Expert Opinion: You can’t go wrong with genuine NGK. This specific pack is the straightforward, high-quality choice for standard replacement maintenance on the four-cylinder models.

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

This option is fundamentally different as it offers a complete ignition tune-up kit, including six ignition coil packs and six double iridium spark plugs. Crucially, this kit is specifically designed for the V6 (3.5L) version of the 2012 Honda Accord, not the common 2.4L four-cylinder. The double iridium plugs are built for maximum lifespan, often rated for 100,000 kilometers, and the included coils ensure that the plugs receive a strong, stable voltage, preventing misfires caused by aging electrical components. This is a comprehensive solution if your V6 Accord is starting to show signs of coil fatigue (common around the 100k mile mark).

Key features that stand out:
– Double Iridium Spark Plug construction provides a much longer working life (up to 100,000 km).
– Includes six UF603 ignition coils for a complete V6 system overhaul.
– Coil construction features a ferrite noise suppressor and advanced thermoplastic connectors for durability.
– Designed to improve cold-start performance and overall running smoothness.

Pros:
– Complete ignition overhaul kit—plugs and coils—for the V6 engine.
– Double Iridium enhances lifespan significantly.
– Addresses multiple potential causes of misfires simultaneously.

Cons:
– This is a 6-pack kit and is not suitable for the 4-cylinder 2.4L Accord engine.

Best for: Owners of the 3.5L V6 2012 Honda Accord who require a comprehensive maintenance package including replacement ignition coils.

Expert Opinion: Replacing coils and plugs together on higher mileage V6 engines is smart maintenance. The double iridium design means you won’t have to worry about the plugs for a very long time after installation.

Comparison Short Insights on Best Spark Plugs For 2012 Honda Accord

Choosing the right plug often comes down to balancing performance, cost, and longevity. If your 2012 Honda Accord has the 2.4L L4 engine, you have the most options (Products 1, 2, 3, 4). The main decision is between the two dominant brands: NGK and DENSO.

The NGK Iridium IX (Products 1 & 4) and DENSO Iridium Power (Product 2) are extremely close contenders. DENSO often boasts the finest tip (0.4mm), which gives a marginal edge in clean ignition and potential fuel economy for performance tuning. NGK, however, is often credited with slightly better overall durability and anti-seizing protection thanks to its plating.

If budget is the deciding factor, the generic Iridium Spark Plugs (Product 3) offer competitive specifications and an excellent warranty, making them a solid alternative to the pricier brand names for standard replacement.

Finally, remember that the UF603 Coil & Plug Kit (Product 5) is only for the V6 3.5L Accord. This comprehensive package is the best choice if you need to address both spark and voltage delivery issues on your larger engine model.

Final Verdict: Which Plug Is Right For Your 2012 Accord?

If you prioritize maximum lifespan and proven reliability for your 2.4L L4, go with the 4 pc NGK Iridium IX Spark Plugs (Product 4). They offer a fantastic blend of durability and OE-level quality that gives you peace of mind for tens of thousands of miles.

If you’re looking to squeeze out maximum responsiveness and fuel efficiency from your 2.4L L4 engine, the 4 pc DENSO Iridium Power Spark Plugs (Product 2), with their ultra-fine tip, are the perfect choice.

If you own the 3.5L V6 model and need a major tune-up, the UF603 Ignition Coil & Double Iridium Spark Plug Kit (Product 5) is the definitive investment, addressing all ignition components at once.

Best Spark Plugs For 2012 Honda Accord: Frequently Asked Questions

Do I need to gap Iridium spark plugs before installing them in my 2012 Accord?

Generally, no. Modern Iridium plugs like the ones reviewed here are precision-gapped at the factory to meet the specific requirements of the Honda engine (usually around 0.044 inches for the 2012 Accord). Attempting to gap fine-wire Iridium plugs can easily damage the delicate center electrode or the ground electrode, potentially ruining the plug. Always confirm the plug is a direct replacement for your engine code.

What is the service interval for spark plugs in a 2012 Honda Accord?

Honda recommends checking or replacing the original equipment Iridium plugs (which many of these options mimic) around the 105,000-mile mark. However, if you are experiencing misfires, rough idling, or a drop in power or fuel economy, replacing them earlier, typically between 80,000 and 100,000 miles, is highly advisable.

Should I choose Iridium or Platinum spark plugs for my 2012 Accord?

For a modern Honda Accord, Iridium plugs are superior. Iridium is much harder and has a higher melting point than Platinum, allowing manufacturers to use an extremely fine center electrode (like the 0.4mm or 0.6mm tips seen in NGK and DENSO). This results in a hotter, more concentrated spark, better engine performance, and a significantly longer lifespan compared to older Platinum designs.

How many spark plugs does the 2012 Honda Accord use?

The number depends entirely on your engine:
* The 2.4L L4 (4-cylinder) engine uses four spark plugs.
* The 3.5L V6 (6-cylinder) engine uses six spark plugs.

Make sure you purchase the correct quantity for your specific vehicle configuration.

What are LSI keywords and why are they important for choosing spark plugs?

LSI (Latent Semantic Indexing) keywords are related terms that search engines use to understand the context of your main topic. When researching the best spark plugs for 2012 Honda Accord, LSI keywords like ignition coil replacement, Honda Accord misfiring, Iridium plug lifespan, and 2.4L L4 engine maintenance are helpful. They ensure you find comprehensive information related to the entire ignition system, not just the plugs themselves.

Can old spark plugs affect my car’s fuel efficiency?

Yes, absolutely. As spark plugs age, the electrodes wear down, requiring higher voltage to bridge the increased gap. This results in a weaker, less efficient spark and incomplete combustion. Replacing old spark plugs with quality new units, such as the DENSO or NGK Iridium options, is one of the most effective ways to restore and maximize your fuel efficiency in the 2012 Honda Accord.