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How often should Lexus spark plugs be changed?

Lexus vehicles typically require spark plug replacement every 60,000 to 100,000 miles, depending on the specific model and driving conditions. Spark plugs play a crucial role in the engine's ignition system, and regular replacement is essential for optimal engine performance and fuel efficiency.


Understanding Spark Plug Replacement Intervals


Spark plugs are responsible for igniting the air-fuel mixture in the engine's cylinders, which powers the vehicle. Over time, the spark plugs can become worn or fouled, leading to misfiring, reduced fuel economy, and even engine damage if not replaced. Lexus recommends following the manufacturer's recommended maintenance schedule for spark plug replacement, which can vary depending on the model and driving conditions.



  • For most Lexus models, the recommended spark plug replacement interval is every 60,000 to 100,000 miles.

  • Factors that can affect the spark plug lifespan include driving conditions, such as frequent towing, heavy loads, or driving in extreme temperatures.

  • In these cases, Lexus may recommend more frequent spark plug replacement, typically every 30,000 to 60,000 miles.

  • It's important to consult your Lexus owner's manual or speak with a certified Lexus technician to determine the appropriate spark plug replacement interval for your specific vehicle.


Regularly replacing your Lexus spark plugs according to the manufacturer's recommendations can help ensure optimal engine performance, fuel efficiency, and longevity.


Signs That Spark Plugs Need Replacement


While the recommended replacement interval is a good guideline, it's also important to be aware of the signs that your Lexus spark plugs may need to be replaced sooner. Some common indicators include:



  • Rough idling or engine misfiring

  • Decreased fuel economy

  • Difficulty starting the engine

  • Increased emissions or exhaust smoke

  • Engine hesitation or lack of power during acceleration


If you notice any of these issues, it's best to have your Lexus inspected by a certified technician, who can diagnose the problem and recommend the appropriate course of action, which may include spark plug replacement.


Importance of Proper Spark Plug Maintenance


Regularly maintaining and replacing your Lexus spark plugs is crucial for the overall health and performance of your vehicle. Neglecting this important maintenance task can lead to a range of issues, including reduced fuel efficiency, decreased engine power, and even long-term engine damage. By following the manufacturer's recommended spark plug replacement intervals and being proactive about addressing any signs of wear, you can help ensure your Lexus continues to perform at its best for years to come.

When should I replace my Lexus spark plugs?


Like every part in your car, spark plugs wear down over time, so you must replace them approximately every 30,000 miles, though this depends on your specific model. You can consult your owner's manual or contact our service center for more information.



How often do you change spark plugs in a Lexus RX 350?


120,000 Miles – While this may seem like a bit of a gap, everything in between 50,000 miles and 120,000 miles is just repeated services. However, at this point, you'll want to have your spark plugs replaced. 150,000 Miles – At this service interval, you'll need a variety of repeated services completed.



Do I really need to replace spark plugs at 60,000 miles?


Depending on the vehicle and what the manufacturer suggests, spark plugs could last anywhere from 60,000 to 105,000 miles. Other than time, they may fail because of various circumstances – carbon buildup, oil getting into the combustion chamber, and overheating of the spark plug tip.



How often should spark plugs be changed on a Lexus RX 350?


Every 6 Years / 60,000 Miles
Every 6 Years / 60,000 Miles
Replace Spark Plugs as required for Emission Control Warranty. Check Drive Belts, starting inspections every 1.5 years or 15,000 miles after that.



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


Labor costs are estimated between $271 and $342 while parts are typically priced around $113. This range does not include taxes and fees, and does not factor in your unique location.



What are signs of bad spark plugs?


What are the signs your Spark Plugs are failing?

  • Engine has a rough idle. If your Spark Plugs are failing your engine will sound rough and jittery when running at idle.
  • Trouble starting. Car won't start and you're late for work… Flat battery?
  • Engine misfiring.
  • Engine surging.
  • High fuel consumption.
  • Lack of acceleration.



How do I know if spark plugs need replacing?


Warning signs it's time to replace your vehicle's spark plugs

  1. The check engine light is on.
  2. Your car doesn't accelerate well.
  3. You hear strange noises.
  4. You visit the gas station more often.
  5. Your car won't start.
  6. The owner's manual says so.
  7. Benefits of replacing old or worn spark plugs.



Why does my car run worse after changing spark plugs?


This can be a sign of spark plugs that are not properly gapped or of poor quality. Loss of Power: The car may experience a significant loss of power, making acceleration sluggish and overall performance lackluster. This can occur if the new spark plugs are of lower quality or not the correct type for the vehicle.



Can spark plugs last 10 years?


Even if you're not having problems, you'll still want to change spark plugs out at every 30,000-mile interval. For most drivers, that will mean that you're due for spark plug service once every 2-3 years!


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.