Best Spark Plugs For Lexus ES 350

When I first noticed a slight hesitation under hard acceleration in my own 3.5L V6 Lexus ES 350, I knew it was time for a spark plug replacement. Choosing the right spark plugs for Lexus ES 350 can be tricky; you need longevity, smooth idle, and that signature quick acceleration without sacrificing fuel economy. Drawing on years of wrench time, I’ve put together this detailed guide comparing some of the top-tested options available, focusing specifically on how they perform in the popular 2007–2018 models. We’ll look at everything from OE-quality iridium to high-performance alternatives and convenient coil pack kits.

IMAGE	PRODUCT NAME	AMAZON LINK
	6 pc NGK Iridium IX Spark Plugs compatible with Lexus…	View on Amazon
	BDFHYK Ignition Coil Pack UF487 and Iridium Spark Plug…	View on Amazon
	6 pc NGK Standard Spark Plugs compatible with Lexus ES300…	View on Amazon
	6 pc DENSO Iridium Power Spark Plugs compatible with…	View on Amazon
	Marsram UF487 Ignition Coil Pack & Double Iridium Spark…	View on Amazon
	6 pc NGK Iridium IX Spark Plugs compatible with Lexus…	View on Amazon
	Ignition Coil Pack & Spark Plugs Compatible with V6 3.0…	View on Amazon

6 pc NGK Iridium IX Spark Plugs compatible with Lexus ES350 3.5L V6 2007-2018

If you’re looking for a straightforward, high-quality upgrade that closely mirrors original equipment standards, these NGK Iridium IX plugs are an excellent choice for your ES 350. They are specifically designed for the 3.5L V6 engine (2GR-FE) found in 2007 through 2018 models, ensuring perfect fitment right out of the box. The Iridium construction provides superior durability and a focused spark, which translates into smoother starts and reliable performance across your Lexus’s entire operating range.

Key features that stand out:
– Genuine NGK Parts: You’re getting OE-quality reliability and engineering.
– Wide Fitment Range: Supports Lexus ES350 models from 2007 through 2018.
– Iridium Construction: Provides a thin electrode for maximum spark concentration and long life.
– Direct Replacement: Includes all necessary hardware and original packaging for a straightforward install.

Pros:
– Exceptional long-term durability and resistance to fouling.
– Provides crisp throttle response and a stable idle.
– Trusted brand known for original equipment manufacturing quality.

Cons:
– These are plugs only; you may need to purchase coils separately if yours are aging.

Best for
Drivers seeking a reliable, long-lasting plug with proven OE-level performance.

Expert Opinion: NGK Iridium IX plugs are a gold standard in the aftermarket. While they might cost a bit more than copper or standard platinum, the lifespan and consistent performance they deliver make them an outstanding value investment for the ES 350 engine.

BDFHYK Ignition Coil Pack UF487 and Iridium Spark Plug 6619 Compatible with Lexus ES350 2007-2015 Lexus RX350 Toyota RAV4 Avalon Camry Toyota Sienna Toyota Coil Pack Coil for Lexus 3.5L Set of 6

Sometimes, when you change the spark plugs on an older high-mileage Lexus, you find that the coils are also due for retirement. This BDFHYK kit offers a complete solution, combining six Iridium spark plugs with six high-quality ignition coils. This is particularly valuable if you’re experiencing hard starts, misfires, or noticeable engine shaking, as it addresses two potential failure points simultaneously. The components use high-quality materials like Japan-imported rubber and silicon steel for extended longevity.

Key features that stand out:
– All-in-One Solution: Includes both the UF487 ignition coils and Iridium spark plugs.
– Iridium Electrode: Ensures quick starting and fast acceleration.
– High-Quality Coil Construction: Made with silicon steel to maximize energy transfer and durability.
– Broad Toyota/Lexus 3.5L Compatibility: Fits many popular models sharing the 3.5L V6 engine platform.

Pros:
– Highly cost-effective replacement for both plugs and coils.
– Designed to immediately address common misfire and hesitation issues.
– Professional-grade materials used in both the coils and plugs.

Cons:
– While budget-friendly, the long-term reliability of non-OE coils can sometimes vary.

Best for
Owners of high-mileage ES 350s (2007-2015) who want to replace the entire ignition system cheaply in one go.

Expert Opinion: Combo kits like this are ideal for mitigating risk. Since replacing the rear bank of plugs on the ES 350 is labor-intensive, swapping out the coils at the same time is a smart move. This set provides strong value for addressing maintenance on older vehicles showing signs of ignition wear.

6 pc NGK Standard Spark Plugs compatible with Lexus ES300 3.0L V6 1994-2003

Important Note: This set is specifically for the older generation Lexus ES300 with the 3.0L V6 engine (1994-2003), not the modern ES 350 (2007+). If you own one of those classic models, this NGK Standard set is the way to go for original performance and feel. These standard (usually copper or nickel alloy) plugs are often what the older engines were tuned for, providing a strong, consistent spark necessary for their design.

Key features that stand out:
– Designed for ES 300 (3.0L V6): Perfect OE-spec fitment for the legacy model range.
– Genuine NGK Quality: Reliable, tested parts you can trust.
– Standard Spark Plug Material: Offers excellent conductivity and performance for older engines.
– Direct Fit: Ensures easy installation without needing modification.

Pros:
– Extremely affordable and offers a great budget-friendly maintenance option.
– Provides the factory-intended spark performance for the 3.0L engine.
– A trusted OE supplier for reliable quality.

Cons:
– These will require changing more frequently than Iridium plugs, typically every 30,000 miles.

Best for
Owners maintaining older Lexus ES 300 models (pre-2007) who prefer OEM compatibility and a lower initial cost.

Expert Opinion: While copper/standard plugs don’t have the 100k-mile life of Iridium, they are often the best choice for engines that require higher conductivity for optimal performance, like many older Toyota V6 designs. Just remember your service interval will be shorter.

6 pc DENSO Iridium Power Spark Plugs compatible with Lexus ES350 3.5L V6 2007-2016

When we talk about performance and fine-tuning, DENSO Iridium Power plugs are often at the top of the list. DENSO is an original equipment manufacturer for Lexus/Toyota, so you know the quality is impeccable. These plugs are engineered for maximum spark energy thanks to their ultra-fine 0.4mm iridium tip, which is one of the smallest tips available on the market. This tiny tip concentrates the spark for exceptional combustion efficiency, leading to potential gains in both power delivery and fuel economy.

Key features that stand out:
– 0.4mm Iridium Tip: Thinner than standard iridium, providing a hotter, more focused spark.
– Tapered Cut U-Groove: Enhances ignitability and reduces the chance of quenching the spark.
– Maximum Performance Focus: Designed to withstand extreme temperatures and deliver superior power.
– Genuine DENSO Quality: Direct OE-level replacement for ES 350 (2007-2016).

Pros:
– Potential for slight improvement in high-RPM performance and throttle response.
– Superior fuel economy due to ultra-efficient combustion.
– Genuine OE quality ensures perfect fit and reliability.

Cons:
– They sit at a premium price point compared to standard Iridium plugs.

Best for
ES 350 owners who prioritize performance and want the highest spark quality available from an OE supplier.

Expert Opinion: The DENSO Iridium Power plugs are fantastic. Their fine-wire electrode design truly delivers superior ignition. If you’re hyper-focused on efficiency and smooth running, these are worth the extra money over standard Iridium plugs.

Marsram UF487 Ignition Coil Pack & Double Iridium Spark Plug Fit for Toyota Lexus 2005-2018 Camry Highlander Avalon Rav4 Sienna Venza RX350 ES350 RX450h 3.5L V6 Replace 90919-02251 90919-A2002 6Pcs

This Marsram kit takes the all-in-one concept a step further by featuring Double Iridium spark plugs. Unlike standard Iridium plugs which only have iridium on the center electrode, Double Iridium uses the precious metal on both the center and ground electrodes. This design significantly extends the plug’s service life and enhances stability over its lifespan. Paired with high-conductivity copper coil packs, this kit aims for maximum durability and reduced maintenance frequency.

Key features that stand out:
– Double Iridium Technology: Offers maximum stability, corrosion resistance, and lifespan.
– High-Quality Coil Construction: Exterior made of epoxy resin to prevent melting from engine heat.
– Enhanced Combustion: Promotes better fuel economy and reduction in emissions.
– Meets/Exceeds OE Design: High manufacturing standards for strength and reliability.

Pros:
– Offers arguably the longest lifespan available for aftermarket spark plugs.
– Comprehensive kit replaces the full ignition system.
– Designed to handle intense engine heat effectively.

Cons:
– Marsram is not an OE brand, so buyers must trust their manufacturing standards.

Best for
The long-haul driver looking for the longest possible service interval and maximum component durability in a full replacement kit.

Expert Opinion: Double Iridium is the technology used in some modern OE applications for maximum 120k+ mile intervals. This kit provides that extreme durability feature along with the necessary coils for the ES 350, making it a powerful choice for fleet vehicles or owners who hate maintenance.

6 pc NGK Iridium IX Spark Plugs compatible with Lexus RX350 3.5L V6 2007-2015

This is essentially the same high-quality NGK Iridium IX plug set as Product 1, but it is marketed and confirmed for the Lexus RX 350. Since the ES 350 and RX 350 share the identical 2GR-FE 3.5L V6 engine platform, these plugs are fully cross-compatible. If you find this set available or at a better price point than the ES 350-specific listing, you can purchase it with confidence. They offer the same reliable cold starts, smooth idle, and extended 100,000-mile service life.

Key features that stand out:
– Full Compatibility with ES 350 3.5L: Shares the same core engine as the RX 350 models listed.
– Genuine NGK Iridium IX: High-reliability, fine-wire electrode.
– Excellent Longevity: Built to last for the full maintenance interval.
– Direct Replacement: Easy installation for the V6 engine.

Pros:
– Highly dependable performance and ignition reliability.
– OE-quality parts from a leading manufacturer.
– Great fitment and easy gapping (pre-gapped from the factory).

Cons:
– Since it’s listed for the RX, always double-check the specific part number (though fitment is usually universal for the 2GR-FE).

Best for
ES 350 owners who cross-reference parts and want the proven reliability of the NGK Iridium line.

Expert Opinion: The 2GR-FE engine is ubiquitous across the Toyota/Lexus lineup. Whether this is labeled for an ES 350 or an RX 350, if the years and engine size match (3.5L V6), you can expect the exact same phenomenal performance from this NGK plug.

Ignition Coil Pack & Spark Plugs Compatible with V6 3.0 3.3 1999-2008 Lexus RX300 RX330 ES300 RX400h Toyota Camry Highlander Sienna Solara Avalon 2000 2001 2002 2003 2004 2005 2006, UF267, Set of 6

Crucial Note: This comprehensive ignition kit is specifically designed for the earlier 3.0L and 3.3L V6 engines used in pre-2007 Lexus ES and RX models. This is not compatible with the standard 3.5L ES 350 (2007+). However, for owners maintaining these legacy models (like the ES 300 or ES 330), this kit is a powerhouse of value. It includes both the coils and pre-gapped plugs necessary to revitalize an older V6 engine experiencing sputtering or misfires.

Key features that stand out:
– Legacy Fitment: Specifically targets older 3.0L and 3.3L Lexus/Toyota V6 engines.
– Complete Kit: Includes 6 coils and 6 pre-gapped spark plugs.
– Addresses Multiple Issues: Designed to solve common misfire, hard starting, and rough idle problems simultaneously.
– High Standards: Produced to meet or exceed OEM specifications for the older engine platforms.

Pros:
– Excellent value proposition for completely overhauling an older ignition system.
– Simplifies the repair process by including all necessary components.
– Wide compatibility for several older Lexus/Toyota models.

Cons:
– The included spark plugs are likely standard material, requiring shorter replacement intervals.

Best for
Owners of Lexus ES 300/ES 330 models (pre-2007) needing a full, cost-effective ignition system replacement.

Expert Opinion: For older, well-worn engines, changing both the plugs and coils is often the most economical choice, as the coils are likely fatigued. This kit offers fantastic coverage for the 1MZ and 3MZ engine families that powered the ES sedan for years.

Comparison Insights: Choosing the Right Spark Plugs For Lexus ES 350.

Selecting the right plug depends on your maintenance philosophy and budget. For the modern 3.5L ES 350 (2007+), you’re choosing between longevity, performance, or convenience.

• For Pure, Proven Reliability: You can’t beat the 6 pc NGK Iridium IX Spark Plugs compatible with Lexus ES350 3.5L V6 2007-2018. NGK is an original equipment supplier and their Iridium IX line offers a fantastic balance of lifespan and performance, making it the safest and most popular choice for ES 350 owners.
• For Maximum Performance: The 6 pc DENSO Iridium Power Spark Plugs stand out. The ultra-fine 0.4mm tip technology is designed specifically to maximize ignition efficiency, potentially offering a crisper throttle feel and the best fuel efficiency.
• For Addressing Misfires: If your car is high mileage and exhibiting rough idle, choosing a Coil Pack & Plug Combo Kit is highly recommended. The BDFHYK and Marsram kits provide everything needed. The Marsram UF487 Double Iridium kit is the superior choice if you prioritize the absolute longest replacement interval.
• A Quick Note on Fitment: Remember that Products 3 and 7 are NOT for the standard ES 350. These kits are for the older ES 300/ES 330 (3.0L/3.3L) models. Always confirm you have the 3.5L V6 before purchasing.

Final Verdict: Our Top Picks for the Lexus ES 350

Making the right choice for your luxury sedan means prioritizing reliability and smooth operation. Here are our definitive recommendations:

The Gold Standard:

The 6 pc NGK Iridium IX Spark Plugs compatible with Lexus ES350 3.5L V6 2007-2018 secures the top spot. It delivers OE-level quality and reliability without demanding a premium price point. If you just need plugs that will last 100,000 miles and perform flawlessly, this is the one to get.

The Best Performance Pick:

If you demand maximum efficiency and enjoy feeling that extra snap in acceleration, the 6 pc DENSO Iridium Power Spark Plugs are your choice. DENSO’s advanced fine-wire technology provides an extremely efficient spark, perfect for keeping your luxury ride running at peak tune.

The Value Maintenance Bundle:

For ES 350 owners fighting persistent ignition issues or planning a major 100,000-mile overhaul, the Marsram UF487 Ignition Coil Pack & Double Iridium Spark Plug set offers unparalleled value. You get the longest-lasting Double Iridium plugs plus new coils, ensuring your entire ignition system is future-proofed for years to come.

Comprehensive FAQs About the Best Spark Plugs for the Lexus ES 350

What is the recommended service interval for spark plug replacement on the Lexus ES 350 (3.5L V6)?

For the modern Lexus ES 350 equipped with factory-installed iridium spark plugs (such as the NGK or DENSO options reviewed), the recommended replacement interval is generally 100,000 to 120,000 miles. Using standard copper or platinum plugs will significantly reduce this interval, often requiring replacement every 30,000 to 60,000 miles. Always check your owner’s manual or stick with high-quality iridium for the longest lifespan.

Should I replace my ignition coils when changing my Lexus ES 350 spark plugs?

It’s highly recommended, especially if your ES 350 has high mileage (over 80,000 miles) or if you are already noticing symptoms like a rough idle, engine misfire, or decreased fuel efficiency. Since accessing the spark plugs (especially the rear bank) is a labor-intensive job on the 3.5L V6 engine (2GR-FE), it’s often cost-effective to replace the coils simultaneously to avoid having to repeat the labor later.

What’s the difference between Iridium and Double Iridium spark plugs?

Standard Iridium plugs typically feature an Iridium center electrode and a platinum or nickel ground electrode. Double Iridium spark plugs (like those in the Marsram kit) utilize iridium alloy on both the center and the ground electrodes. This design provides enhanced durability against erosion on both contact points, further extending the iridium lifespan and ensuring stability for intervals potentially exceeding 120,000 miles.

Are NGK or DENSO better for the 3.5L Lexus engine?

Both NGK and DENSO are original equipment manufacturers (OEM) for Lexus and Toyota, meaning both brands meet extremely high standards. NGK is widely considered the standard for durability and reliability. DENSO, particularly the Iridium Power line, often offers slightly better performance and combustion efficiency due to the ultra-fine electrode design. You won’t go wrong with either for the 2GR-FE engine.

Can using the wrong type of spark plug affect my ES 350’s fuel efficiency?

Absolutely. A spark plug that is not rated for the correct heat range or has a poor gap can lead to incomplete combustion. This results in wasted fuel, potentially causing rough running and a decrease in fuel economy. Sticking to the factory-recommended Iridium type ensures efficient burning, crucial for maintaining the vehicle’s advertised fuel efficiency.

How do I diagnose if I need a spark plug replacement?

Common signs that your Lexus ES 350 spark plug replacement is needed include: difficult cold starts, noticeable engine misfires (often felt as hesitation or jerking), a significant decrease in power or acceleration, and the check engine light illuminated (which often indicates a specific cylinder misfire code).