Best Spark Plugs for Acura TL

I recently went through the headache of figuring out the best spark plugs for my Acura TL. After noticing a slight hesitation during acceleration and dipping fuel economy, I realized it was time for a swap. Choosing the right set of Acura TL spark plugs is crucial, as the J-series V6 engine demands precision components to run smoothly and efficiently. This comprehensive guide compiles the top contenders, from OEM-spec iridium options to budget-friendly alternatives, so you can pick the set that gets your TL running like new again, regardless of whether you drive a 2nd, 3rd, or 4th-generation model.

IMAGE	PRODUCT NAME	AMAZON LINK
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	6 pc NGK Iridium IX Spark Plugs compatible with Acura…	View on Amazon
	6 pc NGK G-Power Spark Plugs compatible with Acura TL…	View on Amazon
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	Iridium Spark Plugs 6 Pack 6994 Compatible with Honda…	View on Amazon
	6 PCSNEW — DENSO #4503 PLATINUM T T Spark Plugs…	View on Amazon
	6 pc NGK G-Power Spark Plugs compatible with Acura TL…	View on Amazon
	UF242 Ignition Coil & 4503 Double Iridium Spark Plug For…	View on Amazon
	6 pc NGK G-Power Spark Plugs compatible with Acura TL…	View on Amazon
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon

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

This A-Premium set is an excellent choice if you own a 3rd-generation Acura TL (2004–2008) and are looking for OEM-level reliability without the OEM price tag. Utilizing a highly durable iridium center electrode paired with a platinum core, these plugs are engineered to maximize ignition performance and provide consistent, strong sparks. They are designed for easy installation and promise a long lifespan, helping you maintain optimal fuel efficiency and power delivery in your V6 engine.

Key features that stand out:
– OEM Compatibility: Directly replaces original equipment plugs like IZFR6K-11.
– Durable Construction: Features an Iridium center tip and Platinum core for superior heat resistance.
– Long Service Interval: Recommended replacement mileage is between 80,000 to 100,000 miles.
– Precise Specifications: Gap Size (IN): 0.044, ideal for specified Acura models.

Pros:
– Excellent lifespan and durability.
– Great value compared to name-brand OEM parts.
– Designed for maximum ignition performance.

Cons:
– Compatibility is specific; ensure you match the exact model year/engine size.

Best for:
Owners of the 3rd-generation Acura TL (2004-2008) seeking OEM performance and longevity at a competitive price.

Expert Opinion: This set hits the sweet spot for budget and quality for the popular 3rd-generation TL. The iridium/platinum combination ensures reliability over long service intervals, meaning you won’t have to worry about replacing them soon.

6 pc NGK Iridium IX Spark Plugs compatible with Acura TL 3.5L 3.7L V6 2009-2014

NGK’s Iridium IX plugs are the gold standard for drivers who demand slightly higher performance and responsiveness from their vehicles. Specifically designed for the 4th-generation Acura TL (2009–2014), these plugs feature a fine-wire center electrode that focuses the spark, resulting in faster, more complete combustion. If you’re looking to restore or slightly enhance the pep in your 3.5L or 3.7L V6, this genuine NGK set is a highly reliable option.

Key features that stand out:
– Performance Focused: Fine-wire iridium tip improves throttle response and efficiency.
– Genuine NGK: Guaranteed quality and fitment from a leading ignition brand.
– Specific Fitment: Designed exactly for the later model 2009-2014 TL V6 engines.

Pros:
– Excellent ignition stability, even under hard acceleration.
– Reliable and durable iridium construction.
– Direct replacement fitment guaranteed.

Cons:
– Priced higher than standard copper or platinum options.

Best for:
Enthusiasts or daily drivers of the 4th-generation TL (3.5L/3.7L) who prioritize performance and brand reliability.

Expert Opinion: NGK Iridium IX is renowned for its consistent quality. While they are usually a performance upgrade, they also provide superior longevity compared to traditional plugs, making them a worthwhile investment for high-mileage drivers.

6 pc NGK G-Power Spark Plugs compatible with Acura TL 3.2L V6 1999-2003

For the classic 2nd-generation Acura TL (1999–2003), the NGK G-Power plugs offer a solid blend of reliability and value. These are platinum plugs, which provide better durability and resistance to fouling than standard copper plugs. This set is a dependable choice for general maintenance, offering improved starting and smooth idling for older V6 engines that might require a little TLC.

Key features that stand out:
– Platinum Construction: Provides better wear resistance than copper plugs.
– Reliable Ignition: Ensures consistent, stable spark for older engines.
– Budget-Friendly: Great option for routine maintenance without breaking the bank.

Pros:
– Excellent choice for standard replacement and maintenance.
– Reliable brand reputation (NGK).
– Specific compatibility for 1999-2003 3.2L V6.

Cons:
– Longevity is generally lower than true iridium/platinum combinations.

Best for:
Owners of the 2nd-generation TL (1999-2003) looking for reliable, economical standard replacement plugs.

Expert Opinion: Platinum plugs are a step up from basic nickel plugs and are usually perfectly adequate for older TL models that aren’t being pushed to their limits. If you change them regularly, these are fantastic value.

A-Premium Iridium Platinum Spark Plugs Compatible with Acura MDX 2010-2013, TL 2009-2014, ZDX 2010-2013, MDX 2010-2013, 3.7L, Pack of 6

This is another high-quality A-Premium set, but tailored specifically for the later V6 3.7L engines found in the 4th-generation Acura TL. Like their other offerings, this pack combines iridium and platinum materials to ensure a high melting point and strong durability suitable for high-performance applications. If your 2009–2014 TL uses the 3.7L engine, these plugs offer an OEM-equivalent fit and performance at a fraction of the dealer cost, focusing on long life and exceptional ignitability.

Key features that stand out:
– Specific 3.7L Fitment: Perfect for the larger V6 engine in the 4th-gen TL.
– Extended Lifespan: Engineered for service intervals up to 100,000 miles.
– Superior Ignitability: Designed alongside OEMs for maximum ignition performance.

Pros:
– Outstanding durability thanks to premium materials.
– Excellent resistance to heat and electrical wear.
– Reliable replacement for OEM reference numbers like ILZKR7B-11S.

Cons:
– Might require careful cross-referencing to ensure it matches your exact sub-model.

Best for:
4th-generation Acura TL owners (2009-2014) with the 3.7L V6 engine who prioritize maximum lifespan and efficiency.

Expert Opinion: The use of Iridium/Platinum in this set guarantees that you’re getting robust performance. For the more powerful 3.7L engine, reliable heat dissipation is key, which these plugs handle very well.

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

Manufactured by A-NAFTULY, this Iridium 6-pack is essentially a direct replacement for the OEM plugs used in the 3rd-generation Acura TL 3.2L and 3.5L V6 engines. The core benefit here is the 0.6mm fine-wire iridium center tip, which is known for maximizing fuel efficiency and providing extremely sharp, consistent ignition. If you’ve been experiencing poor gas mileage, swapping to these high-efficiency iridium plugs could be the solution.

Key features that stand out:
– Fuel Efficiency Focus: Fine-wire tip design maximizes combustion and minimizes fuel consumption.
– Wide 3rd-Gen Fitment: Compatible with both 3.2L and 3.5L V6 TL models (2004-2008).
– Premium Iridium: Material durability is six times harder than standard platinum.

Pros:
– Known for improving horsepower and fuel economy.
– Robust construction ideal for high-performance J-series engines.
– Includes a 12-month worry-free warranty.

Cons:
– Less recognizable brand name compared to NGK or Denso.

Best for:
TL owners (2004-2008) primarily focused on restoring maximum fuel efficiency and seeking strong, durable iridium performance.

Expert Opinion: The focus on laser-welded fine-wire technology confirms this plug is designed for modern engine efficiency. For the mileage-conscious driver, this is a strong contender for the 3rd-gen TL.

6 PCSNEW — DENSO #4503 PLATINUM T T Spark Plugs — PK16TT

Denso is another top-tier name in spark plug technology, and the Platinum TT (Twin-Tip) series offers unique engineering benefits. The Twin-Tip structure means both the center electrode (1.1mm platinum) and the ground electrode (titanium-enhanced alloy) are incredibly fine and durable, allowing for maximum spark energy and reduced erosion. This design maintains a sharp spark over a much longer period compared to standard platinum plugs, ensuring reliable performance in various Acura TL generations, depending on the specific application lookup.

Key features that stand out:
– Twin-Tip Structure: Promotes superior ignitability and efficiency.
– Titanium-Enhanced Alloy: Increases durability of the ground electrode to prevent wear.
– 360 Laser Welding: Ensures maximum structural integrity.

Pros:
– Advanced Denso technology for sustained performance.
– High durability minimizes tip erosion.
– Promotes complete fuel combustion.

Cons:
– Must verify specific compatibility for your TL engine code and year before purchase.

Best for:
Drivers seeking advanced technology and high-quality construction from a recognized OEM supplier like Denso.

Expert Opinion: Denso’s Twin-Tip design is an innovative way to achieve near-iridium performance characteristics using highly durable platinum, making it a reliable option where specified.

6 pc NGK G-Power Spark Plugs compatible with Acura TL 3.5L 3.7L V6 2009-2014

If you own a later model 4th-generation TL (2009–2014) but prefer a more economical maintenance route, this NGK G-Power Platinum set is a suitable option. While iridium is the factory standard for these newer models, the G-Power plugs offer dependable platinum stability for consistent ignition. This set is ideal if you plan on selling the car soon or perform maintenance more frequently and don’t require the 100,000-mile service life of iridium plugs.

Key features that stand out:
– Cost-Effective Maintenance: Reliable replacement without the iridium price tag.
– Platinum Core: Provides better durability and fouling resistance than copper.
– Genuine NGK: Trusted fitment for the 2009-2014 TL V6.

Pros:
– Exceptional value and affordability.
– Trusted NGK reliability.
– Excellent for smooth idling and cold starts.

Cons:
– Will not last as long as the iridium equivalent specified for this generation.

Best for:
Budget-conscious owners of the 4th-generation TL who are willing to accept shorter service intervals.

Expert Opinion: While NGK recommends Iridium IX for this specific generation, this G-Power set functions perfectly well as a standard replacement. Just be prepared to check or replace them closer to the 40,000-60,000 mile mark.

UF242 Ignition Coil & 4503 Double Iridium Spark Plug For Honda 1999-2010 Odyssey,2000-2003 Accord/Acura 1999-2008 TL, 2005-2008 RL,2001-2003 CL 3.2L 3.5L V6 Replaces# 30520-P8E-A01

This kit is a fantastic value proposition because it addresses two common maintenance issues simultaneously: spark plugs and ignition coils. Designed for 2nd and 3rd-generation TL models (1999–2008), this package includes six double iridium spark plugs (rated for 100,000 km) and six corresponding ignition coil packs. If you are experiencing serious symptoms like engine misfire or rough idle, often caused by failing coils, replacing both components at once ensures a complete ignition system refresh.

Key features that stand out:
– Complete Ignition Overhaul: Includes 6 coils and 6 spark plugs.
– Double Iridium Plugs: Guarantees superior longevity (up to 100,000 kilometers).
– Improved Performance: Coils are designed to provide superior cold-start performance and a smoother running engine.
– Coil Quality: Features advanced thermoplastic connectors and stainless-steel spring internals.

Pros:
– Comprehensive solution for common misfire issues.
– Double iridium construction offers extreme durability.
– Significantly cheaper than buying OEM coils and plugs separately.

Cons:
– The included coils might not meet the strict quality standards of OEM Honda/Acura parts, despite the good plugs.

Best for:
TL owners (1999-2008) who need a full ignition system refresh due to misfires or rough idling.

Expert Opinion: For an older high-mileage TL, replacing the coils along with the plugs is preventative maintenance genius, especially since the rear bank coils are hard to reach. This kit provides that solution affordably.

6 pc NGK G-Power Spark Plugs compatible with Acura TL 3.2L 3.5L V6 2004-2008

Here is the NGK G-Power option specifically tailored for the 3rd-generation Acura TL (2004–2008). Just like its 2nd-gen counterpart, this set offers reliable platinum ignition perfect for drivers seeking routine maintenance at a lower cost than iridium. If your 3.2L or 3.5L TL is still running its original ignition system but you don’t drive high mileage, these platinum plugs are a safe, quality choice to ensure smooth engine operation.

Key features that stand out:
– Targeted 3rd-Gen Fitment: Compatible with 2004-2008 3.2L and 3.5L V6.
– Platinum Durability: Enhanced resistance to oxidation and wear compared to copper.
– Reliable Performance: Known for quick starts and stable idle.

Pros:
– Exceptional balance of quality and price.
– Trusted NGK engineering and fitment.
– Ideal for standard maintenance intervals.

Cons:
– You will need to replace these sooner than the iridium equivalents.

Best for:
3rd-generation TL drivers seeking a quality, budget-friendly platinum option for regular service intervals.

Expert Opinion: NGK provides accurate fitment for the TL, making installation straightforward. If you prioritize saving money now and don’t mind a mid-range service life, these G-Power plugs are a dependable choice.

A-Premium Iridium Platinum Spark Plugs Compatible with Honda Accord 1995-2002, Pilot 2003-2005, Odyssey 1999-2004 & Acura MDX 2001-2002, TL 1999-2003, MDX & Mazda 626, Millenia, MPV, MX-6, Pack of 6

This A-Premium set caters specifically to the earlier V6 engines, including the 2nd-generation Acura TL (1999–2003). Featuring a robust iridium center electrode and a platinum core, this combination offers superior longevity and reliability compared to standard OE plugs from that era. For owners of older TL models, installing these plugs means you get modern durability and ignition technology suitable for the age and mileage of the vehicle.

Key features that stand out:
– Old-Gen TL Compatibility: Perfect fit for 1999-2003 V6 3.2L.
– Iridium/Platinum Mix: Offers modern durability and resistance to fouling.
– Long Lifespan: Recommended replacement interval of 80,000 to 100,000 miles.

Pros:
– Significant upgrade in durability for older engine applications.
– Wide compatibility with other Acura/Honda J-series engines.
– Focuses on exceptional ignitability.

Cons:
– Specifications must be double-checked due to the wide range of compatible vehicles listed.

Best for:
Owners of the 2nd-generation Acura TL (1999-2003) looking for the longest possible service life from their plugs.

Expert Opinion: Choosing an iridium plug for an older vehicle like the 2nd-gen TL is a great way to ensure maintenance is less frequent and the car maintains high efficiency, compensating for aging engine components.

Comparison Insights: Choosing the Right Spark Plug For Your Acura TL

Selecting the right plug often comes down to balancing performance needs against desired longevity and budget.

If you own a 3rd Gen (2004-2008) or 4th Gen (2009-2014) Acura TL, Iridium is the factory standard and recommended choice. Plugs like the NGK Iridium IX or the A-Premium Iridium Platinum sets provide maximum horsepower and responsiveness while offering an extremely long service life, typically 80k to 100k miles. They are worth the higher initial investment.

For the 2nd Gen (1999-2003) TL, while Iridium plugs (like the A-Premium 1999-2003 set) are an excellent upgrade, the NGK G-Power Platinum plugs offer excellent value for standard maintenance and are perfectly adequate if you change them at regular, shorter intervals.

If you are diagnosing a significant engine issue like a persistent misfire, the UF242 Ignition Coil & Double Iridium Spark Plug kit is invaluable if you suspect coil pack failure along with plug replacement. This provides a complete ignition refresh and is highly practical for high-mileage J-series V6 engines.

Remember that precise vehicle fitment is critical for the Acura TL, especially when differentiating between the 3.2L, 3.5L, and 3.7L engines across the generations. Always confirm the specific OEM reference number before buying.

Final Verdict: Our Top Choices for the Acura TL

We’ve reviewed several excellent options, but which one truly stands out depends entirely on your TL’s model year and your primary driving goals.

The No-Compromise, OEM-Grade Choice (2004-2014 Models):
The A-Premium Iridium Platinum Spark Plugs (various fitments) consistently deliver high durability, exceptional performance, and the guaranteed 80,000+ mile lifespan that modern Acura engines require. If you want factory performance and longevity for the 3rd or 4th generation TL, these are tough to beat.

The Best Performance Upgrade (2009-2014 Models):
The 6 pc NGK Iridium IX Spark Plugs are the preferred choice for drivers who want the absolute best responsiveness and ignition quality from their 4th-generation V6 engines. NGK is a name you can trust for subtle performance gains.

The Best Value and Maintenance Option (All Generations):
If you need a reliable plug but don’t want to splurge on iridium, the various NGK G-Power Platinum sets are unbeatable. They offer significant improvement over basic plugs and are a very dependable choice for owners who stick to frequent, scheduled maintenance.

Frequently asked questions About Best spark plugs for Acura TL

Q1: How often should I replace the spark plugs in my Acura TL?

For most 3rd and 4th-generation Acura TL models, the factory-recommended interval for the original Iridium spark plugs is typically between 80,000 and 105,000 miles. If you choose standard Platinum or Copper plugs, this interval must be significantly reduced, often to 30,000 to 45,000 miles, to maintain peak engine efficiency.

Q2: What is the difference between Iridium and Platinum spark plugs for the Acura TL?

Iridium is generally superior. It has a higher melting point than Platinum, allowing for a finer center electrode tip. This finer tip requires less voltage to fire and lasts much longer (up to 100k miles). Platinum plugs (like NGK G-Power) are a good mid-range option, offering better wear resistance than copper, but their service life is shorter than Iridium.

Q3: Do Acura TL spark plugs come pre-gapped?

Most high-quality Iridium and Platinum spark plugs designed for the Acura TL (especially NGK and Denso) are advertised as being “pre-gapped” to the factory specification. However, due to potential damage during shipping, it is highly recommended that you always check the gap using a wire-style feeler gauge before installation. The Acura TL V6 gap is usually 0.044 inches.

Q4: Can using the wrong heat range spark plug damage my Acura TL engine?

Yes, installing a spark plug with an incorrect heat range can be detrimental. A plug that is too “hot” (retains too much heat) can cause pre-ignition and engine pinging, potentially damaging pistons and valves. A plug that is too “cold” (dissipates heat too quickly) can lead to fouling, causing misfires and poor fuel economy. Always use the specified OEM heat range (e.g., NGK IZFR6K-11).

Q5: What are the common signs that my Acura TL needs new spark plugs?

If your Acura TL spark plugs are wearing out, you’ll typically notice: 1) Engine misfires or rough idling, especially when cold. 2) Sluggish acceleration or loss of power. 3) Decreased fuel economy. 4) Difficulty starting the engine. If you notice any of these symptoms near your recommended replacement mileage, it’s definitely time for a check-up.

Q6: Are the spark plugs for the front and rear banks of the Acura TL V6 the same?

Yes, for the Acura TL V6 (J-series engines), all six spark plugs are identical in terms of part number, size, and specifications. The challenge in replacement comes from accessing the rear bank of plugs, which are often located underneath the intake manifold.