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What are the best spark plugs for Lexus?


When it comes to maintaining your Lexus, choosing the right spark plugs is essential for ensuring optimal performance, fuel efficiency, and engine longevity. As a seasoned auto repair professional, I’ve worked on countless Lexus models over the years, and I can confidently guide you through selecting the best spark plugs for your vehicle.


Why Spark Plug Quality Matters for Your Lexus


Spark plugs play a critical role in your engine's combustion process. They ignite the air-fuel mixture in the engine cylinders, powering your vehicle. Using high-quality spark plugs ensures:



  • Improved fuel efficiency

  • Smoother engine performance

  • Reduced emissions

  • Longer engine life


For a luxury vehicle like a Lexus, it’s especially important to use spark plugs that meet or exceed the manufacturer’s specifications to maintain the car’s premium performance.


Recommended Spark Plug Types for Lexus


Lexus vehicles typically perform best with iridium or platinum spark plugs due to their durability and efficiency. Here are the top options:



  • Denso Iridium Spark Plugs: These are often the original equipment manufacturer (OEM) spark plugs for Lexus vehicles. They provide excellent performance and longevity, making them a reliable choice.

  • NGK Iridium IX Spark Plugs: Known for their high-quality construction, NGK spark plugs are another excellent option for Lexus owners. They offer a strong spark and are designed to last for tens of thousands of miles.

  • Bosch Platinum Spark Plugs: While not as common as Denso or NGK for Lexus, Bosch platinum plugs are a solid alternative, offering good performance and durability.


How to Choose the Right Spark Plugs for Your Lexus


When selecting spark plugs, consider the following factors:



  • Check Your Owner’s Manual: Always refer to your Lexus owner’s manual for the recommended spark plug type and specifications.

  • Match the Heat Range: Ensure the spark plugs you choose match the heat range specified for your Lexus model to avoid overheating or fouling.

  • Opt for OEM or Better: While aftermarket options can be tempting, sticking with OEM or high-quality aftermarket brands ensures compatibility and performance.


When to Replace Your Lexus Spark Plugs


Most Lexus models require spark plug replacement every 60,000 to 120,000 miles, depending on the type of spark plugs used and driving conditions. Signs that it’s time to replace your spark plugs include:



  • Decreased fuel efficiency

  • Rough idling or engine misfires

  • Difficulty starting the engine

  • Reduced acceleration


Final Thoughts


Choosing the right spark plugs for your Lexus is a small but crucial step in maintaining its performance and reliability. Whether you opt for Denso, NGK, or Bosch, ensure the spark plugs meet your vehicle’s specifications. If you’re unsure or need assistance, don’t hesitate to reach out to a trusted auto repair professional. At Kevin’s Autos, we’re always here to help you keep your Lexus running like new!


Frequently Asked Questions

Does Lexus use Denso?


Lexus is a Toyota brand, and they typically are manufactured by Denso, or NGK.



Is NGK Premium RX better than iridium?


Benefits of NGK RX PREMIUM (VS IRIDIUM) :
- Increased longevity of 20 to 40% compared to NGK IRIDIUM MAX. - Increased longevity beyond double compared to NGK Iridium IX. - Ruthenium undisputed benefits over the stability of the ignition and its corrosion resistance related to combustion effects.



Is DENSO the same as OEM?


Denso is the OEM for Honda and produces many parts for other imports as well. This is considered "Gray market" not "After market" since it is the same manufacture of OEM stamped products.



Is it better to get OEM spark plugs?


One of the primary benefits of OEM spark plugs is that they ensure compatibility. OEM plugs also tend to have a reputation for quality, lasting as long as the originally installed set. However, this quality and precision come at a price.



What is the highest quality spark plug?


Platinum spark plugs boast longevity and resistance to fouling. Since platinum is harder, it holds its sharp edge much longer than a conventional spark plug, up to 100,000 miles. Platinum spark plugs come in two varieties - single and double platinum.



How much does it cost to replace spark plugs in a Lexus?


Labor costs are estimated between $271 and $342 while parts are typically priced around $113.



Which is better, NGK or denso spark plugs for Toyota?


NGK and Denso are both fine plugs. Toyota uses both brands in manufacturing. On the V6, sometimes you see one bank with Denso and the other with NGK. IMO, get which ever one costs less because you won't notice any difference between the NGK and Denso.



What spark plugs are best for Lexus?


  • Autolite XP Iridium Spark Plug XP5325. Customize.
  • Autolite XP Iridium Spark Plug XP3923. Customize.
  • Autolite XP Iridium Spark Plug XP3924. Customize.
  • Autolite XP Iridium Spark Plug XP5684.
  • Autolite XP Iridium Spark Plug XP5683.
  • Bosch Iridium Spark Plug FR7NI33.
  • Bosch Iridium Spark Plug 9600.
  • Bosch Iridium Spark Plug 9613.



What is OEM for Lexus?


Lexus parts come in three main types: used or “recycled” parts, aftermarket parts, and “OEM” or Original Equipment Manufacturer parts. Here are 5 ways that choosing OEM parts benefit your car. Guaranteed to Fit Your Car.



How often should Lexus spark plugs be changed?


every 100,000 miles
General Guidelines for Spark Plug Replacement
Although the aforementioned signs are reliable indicators, adhering to a structured maintenance schedule can preempt many potential issues. Generally, for modern Lexus models equipped with iridium or titanium spark plugs, replacement is recommended every 100,000 miles.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.