Best Spark Plugs For Acura TSX Featuring 5 Quality Options

When I first bought my Acura TSX, I quickly learned how critical the ignition system is to the K24 engine’s legendary responsiveness. After spending countless hours swapping out plugs and testing different configurations, I put together this guide to the best spark plugs for acura tsx. Whether you drive the first-gen 2004-2008 model or the later generation, these tested options will help restore that crisp throttle response, ensure smooth idling, and maintain optimal fuel efficiency. Getting the right plugs is the easiest way to give your Acura the premium performance it deserves.

IMAGE	PRODUCT NAME	AMAZON LINK
	4 pc NGK Laser Iridium Spark Plugs compatible with Acura…	View on Amazon
	AULINK Set of 4 UF417 Ignition Coil Pack & SP1018…	View on Amazon
	A-Premium Ignition Coils and Spark Plugs Kits Compatible…	View on Amazon
	4 pc DENSO Platinum TT Spark Plugs compatible with Acura…	View on Amazon
	Iridium Spark Plugs 4 Pack 6994 IZFR6K11 Compatible with…	View on Amazon

4 pc NGK Laser Iridium Spark Plugs compatible with Acura TSX 2.4L L4 2004-2008

NGK is the gold standard when it comes to ignition components for Honda/Acura vehicles, and these Laser Iridium plugs are often considered the factory equivalent for the K24 engine found in the 2004-2008 TSX. They offer exceptional durability and a highly stable spark, thanks to the laser-welded iridium tip and platinum disc on the ground electrode. This dual-precious-metal configuration ensures extreme longevity—often up to 100,000 miles—while maintaining maximum engine performance and reliability. If you want true OEM reliability and fitment for your first-gen TSX, look no further than these.

Key features that stand out:

• Genuine NGK Parts: Ensures precise fit and performance demanded by the K24 engine.
• Laser Iridium Tip: Provides superior durability and consistent performance over a long service life.
• Platinum Ground Electrode: Works with the iridium center electrode to resist fouling and wear.
• Direct Replacement: Designed specifically for the Acura TSX 2.4L L4 models from 2004 through 2008.

Pros:
– Industry leader in quality and consistency
– Provides stable idle and factory-level performance
– Extremely long replacement interval
– Less prone to misfires under load

Cons:
– Higher initial cost compared to standard plug types

Best for: Drivers seeking factory performance, maximum reliability, and long service intervals on 2004-2008 models.

Expert Opinion: NGK Laser Iridium is the benchmark for the Acura TSX. While they carry a premium price, the lifespan and consistent quality make them the most cost-effective option over the long run.

AULINK Set of 4 UF417 Ignition Coil Pack & SP1018 Spark Plugs For Acura TSX 2.4L 2004 2005 2006 2007 2008, RDX 2.3L 2007 2008 2009 2010 2011 2012 52-1781 30520-PNC-004

Sometimes, replacing the spark plugs isn’t enough; you might need to address aging coil packs, especially if you’re experiencing rough idling or occasional misfires (CEL flashing). This AULINK set provides a comprehensive solution, bundling four quality ignition coils and the necessary spark plugs (SP1018). This kit is tailored for the 2004-2008 TSX 2.4L and offers excellent value, allowing you to refresh the entire ignition system in one go. The coils are manufactured to handle high heat and are leakage tested for superior performance.

Key features that stand out:

• Full Ignition System Overhaul: Includes both spark plugs and critical UF417 ignition coils.
• OEM Cross-Reference: Coils match several major OEM part numbers (e.g., 30520-PNC-004).
• Premium Build Quality: Coils are designed to resist high temperature and impact.
• Warranty Included: Backed by a 1-year or 50,000 km warranty for peace of mind.

Pros:
– Exceptional value for replacing plugs and coils simultaneously
– Coils address misfire issues often unrelated to plugs
– Strict quality control standards (TS16949 certified)
– Trivalent metal plated spark plugs included

Cons:
– Quality of the included spark plugs might not match NGK/Denso longevity

Best for: TSX owners looking for a budget-friendly complete ignition system refresh on first-generation models.

Expert Opinion: If your TSX is approaching high mileage and you’re starting to see occasional misfires or hesitation, replacing the coil packs along with the spark plugs is wise preventative maintenance. This kit offers fantastic value for that purpose.

A-Premium Ignition Coils and Spark Plugs Kits Compatible with Acura TSX 2009-2014 L4 2.4L

For those driving the second-generation TSX (2009-2014), the ignition components shift slightly, and this A-Premium kit provides the precise fitment needed for the updated L4 2.4L engine. Like the previous option, this package delivers a complete ignition system replacement, featuring high-quality iridium spark plugs paired with reliable bolt-on ignition coils (Reference number 30520RL5A01). The iridium plugs are highlighted for their ability to significantly extend service life, ensuring a more stable idle speed, and improving fuel efficiency right out of the box.

Key features that stand out:

• Iridium+Nickel Spark Plug Material: Extends spark plug life nearly threefold compared to standard plugs.
• Compatibility: Specifically designed for the 2009-2014 Acura TSX 2.4L.
• Improved Performance Metrics: Claims reduced emissions and faster starting up.
• One-Year Guarantee: Backed by a robust one-year unlimited-mileage warranty.

Pros:
– Engineered for the specific requirements of the second-gen TSX
– Coil packs are designed for reliable output
– Ensures stable engine performance and improved efficiency
– Great comprehensive replacement option

Cons:
– Less suitable if you only need spark plugs and your coils are new

Best for: Owners of the 2009-2014 TSX models needing to replace both aging coil packs and spark plugs simultaneously.

Expert Opinion: The shift in engine hardware between the first and second-gen TSX requires specific components. This A-Premium kit removes the guesswork for newer models, offering reliable performance and the benefits of modern iridium technology.

4 pc DENSO Platinum TT Spark Plugs compatible with Acura TSX 2.4L L4 2004-2008

Denso is another primary OEM supplier for Honda and Acura, and their Platinum TT (Twin Tip) technology is an impressive advancement in spark plug design. These plugs feature a fine 1.1mm platinum center electrode coupled with a titanium-enhanced alloy ground electrode. This unique “twin-tip” design minimizes quenching—the cooling of the spark—leading to a more potent and focused spark. In real-world use, this translates directly to faster starts, superior fuel economy, and potentially more power than standard nickel or single-tip plugs. They are an excellent, high-performance option for the 2004-2008 TSX.

Key features that stand out:

• Platinum TT Design: Twin-tip construction reduces quenching for a more powerful spark.
• Improved Durability: Titanium-enhanced alloy ground electrode provides resistance against corrosion and heat.
• Superior Fuel Economy: The larger, more efficient spark helps ensure complete combustion.
• Genuine DENSO Quality: Direct replacement auto parts meeting OE standards.

Pros:
– Enhanced horsepower and quicker throttle response
– Excellent fuel efficiency improvements
– Reliable performance from an OEM supplier
– Consistent spark output over time

Cons:
– Platinum generally doesn’t last as long as Laser Iridium plugs

Best for: Drivers prioritizing slightly quicker acceleration and optimizing fuel efficiency in the 2004-2008 TSX.

Expert Opinion: The DENSO Platinum TT offers a compelling alternative to NGK. The twin-tip design is genuinely innovative, delivering noticeable benefits in engine responsiveness, making it one of the best spark plugs for acura tsx enthusiasts.

Iridium Spark Plugs 4 Pack 6994 IZFR6K11 Compatible with 2003-2007 Honda Accord 2.4 CRV Element & Acura TSX 2003 2004 2005 2006 2007 2008, Civic & RSX 2.0L 02-05 Replaces IZFR6K-11, 9807B-561BW

This Iridium 4-pack stands out due to its incredibly broad compatibility across the K-series and Honda platform, fitting the Acura TSX 2.4L from 2004-2008, as well as several Honda Accord and CRV models. Utilizing a 0.6mm fine-wire iridium center tip and advanced laser welded technology, these plugs are built for today’s high-performance engines, ensuring rapid ignition and reliable service. The benefit of iridium here is its extremely high melting point, providing high durability against electrical and thermal wear, which is crucial for high-revving K24 engines.

Key features that stand out:

• Fine-Wire Iridium Center Electrode: Six times harder than platinum for maximum durability.
• Exceptional Fuel Efficiency: 0.6mm fine-wire tip minimizes voltage requirements and maximizes combustion.
• Wide Fitment Range: Excellent choice for owners with multiple compatible Honda/Acura vehicles.
• Warranty Included: Comes with a 12-month worry-free warranty.

Pros:
– Superior durability due to high-melting-point iridium alloy
– Excellent choice for ensuring exceptional fuel economy
– Affordable and reliable Iridium replacement option
– Great reference replacement for many OEM parts

Cons:
– Brand recognition is lower compared to NGK or Denso

Best for: Value-conscious buyers prioritizing the extended life benefits of fine-wire iridium technology on first-generation models.

Expert Opinion: While not a “major” name brand, the technical specifications (fine-wire iridium and laser welding) meet or exceed OE standards for durability. If you prioritize budget and longevity, these are highly capable spark plugs for the Acura TSX.

Comparison Short Insights: Choosing Your TSX Spark Plugs

When navigating the market for the best spark plugs for acura tsx, you often face two major choices: brand preference and material type.

NGK Laser Iridium (Product 1) vs. DENSO Platinum TT (Product 4): These are the two industry giants. NGK is generally favored for its guaranteed OEM longevity, often hitting the 100,000-mile mark reliably, providing the most consistent long-term performance. DENSO, with its Platinum TT design, tends to offer a marginal edge in responsiveness and fuel economy due to the reduced quenching effect, though its service interval might be slightly shorter than NGK Iridium.

Plugs Only vs. Coil Kits (Products 2 & 3): If your TSX has under 100,000 miles and isn’t exhibiting misfires, you likely only need new spark plugs (Products 1, 4, or 5). However, if your car is high mileage, or you have confirmed misfire codes, the AULINK or A-Premium kits offer substantial cost savings by bundling new coil packs, which often degrade around the same time as the plugs. Be sure to check the specific fitment: AULINK is for 2004-2008 and A-Premium is for 2009-2014.

The Iridium Advantage: Products 1, 3, and 5 utilize Iridium, prized for its extreme hardness and resistance to high heat, making it the superior choice for high-mileage, high-performance longevity. Platinum (Product 4) is highly reliable but typically doesn’t offer the same extended lifespan as iridium, though it remains an excellent choice for efficient combustion.

Final Verdict: Which TSX Spark Plugs Should You Buy?

The right choice depends entirely on your vehicle’s specific needs and mileage.

For Unquestioned Reliability and Longevity (The OEM Choice): We highly recommend the 4 pc NGK Laser Iridium Spark Plugs (Product 1). They are the tried-and-true solution for the K24 engine, providing a stable idle and documented 100k+ mile performance.

For Improved Response and Efficiency: If you want to squeeze a little extra performance out of your engine while maintaining quality, go with the 4 pc DENSO Platinum TT Spark Plugs (Product 4). The unique twin-tip technology provides excellent combustion.

For High-Mileage Ignitions (Best Value Combo): If your 2004-2008 TSX is showing signs of ignition system fatigue, the AULINK Set of 4 Ignition Coil Pack & Spark Plugs (Product 2) provides the most comprehensive and economical fix, refreshing your coils and plugs in one job.

Frequently Asked Questions About the Best Spark Plugs for Acura TSX

How often should I replace the spark plugs in my Acura TSX?

Most Acura TSX models (featuring the K24 engine) that use factory-recommended iridium spark plugs have an intended replacement interval of 100,000 to 105,000 miles. However, if you use your car for heavy commuting, high-performance driving, or track use, inspecting and replacing them closer to the 80,000-mile mark can help maintain peak engine health.

What happens if I wait too long to change my best spark plugs for acura tsx?

Delaying spark plug replacement can lead to several problems. The most common symptoms are reduced fuel efficiency, engine misfires (especially under heavy acceleration), rough idling, difficulty starting the engine, and potentially fouling your ignition coils. Severe, prolonged misfiring can also damage the catalytic converter dueor to unburnt fuel entering the exhaust system.

Do I need to gap iridium spark plugs for my K24 engine?

In almost all cases, high-quality iridium or platinum plugs—like the NGK and Denso options—come pre-gapped specifically for the Acura TSX engine. While it’s always best practice to double-check the gap against your vehicle’s specifications (usually found on the hood or in the owner’s manual), you generally should avoid adjusting the gap on fine-wire electrodes, as improper gapping tools can easily damage the delicate iridium tip.

Is Iridium or Platinum better for the Acura TSX?

Iridium is generally considered superior for longevity. It is harder, has a higher melting point, and offers more stable performance over a longer period, making it the preferred material for long-life performance plugs. Platinum is very efficient at conducting electricity and is more durable than traditional copper, but it typically offers a slightly shorter lifespan than premium iridium options.

What are LSI keywords and why are they important when discussing the best spark plugs for acura tsx?

LSI (Latent Semantic Indexing) keywords are conceptually related terms that help search engines understand the broader context of the article. For example, when discussing the best spark plugs for acura tsx, using LSI terms like K24 engine, ignition coil packs, throttle response, and misfires confirms the article’s depth and relevance to ignition maintenance.

Why would I need to replace my ignition coil packs along with the plugs?

Ignition coil packs, which provide the high voltage needed to jump the spark plug gap, degrade over time, especially due to heat exposure. If your TSX has high mileage (over 100,000 miles), replacing the coil packs at the same time as the spark plugs is preventative maintenance. Failed coil packs are often the cause of persistent misfires, even with new spark plugs installed.