How much does it cost to replace spark plugs in a Lexus IS250?

Replacing the spark plugs on a Lexus IS250 typically runs about $300 to $500 at an independent shop, while a dealership can charge $450 to $700, depending on plug type and local labor rates.

The Lexus IS250 uses a six-cylinder V6 engine with six ignition cylinders. Spark plug replacement is a routine maintenance task, but the final price can vary based on plug type, access in the engine bay, and where you have the work done. This article breaks down typical costs, factors that influence pricing, and what to expect from different service providers.

Cost breakdown and typical ranges

The total cost at the time of service comprises parts and labor. The following figures reflect common ranges you’ll see in the U.S. market.

• Independent repair shop: Spark plugs typically cost about $10–$25 each for standard iridium/platinum variants, totaling roughly $60–$150 for six. Labor is usually 1.5–2.5 hours at about $100–$150 per hour, adding around $150–$375. All-in pricing commonly falls in the $210–$525 range, depending on plug type and local rates.


• Dealership: Spark plugs can be more expensive, often around $15–$40 per plug, totaling roughly $90–$240 for six. Labor rates at a dealership often run $150–$250 per hour, with 1.5–2.5 hours of work adding about $225–$625. In total, expect roughly $315–$865.

Note: Some IS250 models require extra steps or parts (for example, ya may need to replace ignition coils if they show wear or if access is particularly tight). This can add to the bill. Always ask for a parts-and-labor estimate before authorizing service.

What affects the price

Several factors influence the final bill beyond base plug price and shop labor rate.

• Plug type and quality: Copper plugs are cheaper; platinum or iridium variants cost more. OEM vs aftermarket plugs can swing the price by $60–$150 for a full set.


• Labor complexity: Access in the IS250’s engine bay may require removing covers or components, increasing time and cost.


• Regional labor rates: Urban areas and luxury-brand service centers typically charge more per hour than rural independents.


• Additional maintenance: If the service includes ignition coil inspection/replacement or an oil change, the price increases accordingly.

Environmental or shop policies, disposal fees, and any applicable diagnostics can also affect the final price in some locations.

Is it worth doing now or waiting?

If you notice misfiring, rough idle, reduced fuel economy, or starting trouble, spark plug replacement is prudent. For many IS250 owners, a replacement interval around 100,000 miles is common for iridium/platinum plugs, but check your owner’s manual or consult a Lexus service advisor for the model’s exact recommendation based on engine code and driving conditions.

Remember: The IS250 uses coil-on-plug ignition coils; if coils show wear or failure signs, a shop may suggest replacing them along with the plugs, which would raise the total cost.

Summary

In summary, plan for roughly $300–$500 at an independent shop and $450–$700 at a dealership for a six-spark-plug replacement on a Lexus IS250, with actual costs varying by plug type, local labor rates, and any additional maintenance. Always obtain a written estimate before service to compare options and avoid surprises.

What year to avoid Lexus is 250?

You should avoid Lexus IS 250 models from the 2006-2009 years, as they are prone to issues like carbon buildup in the engine, melting/sticky interior plastics, and an outdated infotainment system. Models from 2010 and newer are better because they have updated piston rings to address the carbon buildup issue and revised interior components. The Lexus IS 350 is often recommended as a better alternative due to its more powerful engine and avoidance of the specific 250's direct injection engine problems. 
Years to avoid

• 2006-2009: These years are known for significant problems.
  • Engine: The direct injection engine is prone to carbon buildup, which can lead to oil consumption and misfires. This issue was a major reason some owners avoid these years altogether.
  • Interior: Many owners reported melting or sticky dashboards and door panels, especially in these model years.
  • Infotainment: The navigation and overall infotainment system is considered very outdated by modern standards. 

Recommended models

• 2010 and newer: These models are the preferred choice for the IS 250 because they feature an updated engine with revised piston rings to combat the carbon buildup problem.
• 2010 and newer: These years also have updated interior components, which should prevent the melting/sticky dash and door panel issues.
• IS 350: If your budget allows, the IS 350 is often recommended as a more powerful alternative that does not have the specific direct injection engine problems found in the IS 250. 

Other considerations

• Even with the updated 2010+ models, regular maintenance is crucial. Owners recommend consistent oil changes and checking the fluids to ensure the longevity of the vehicle. 
• Some owners of the IS 250 have successfully maintained their older models by following a rigorous maintenance schedule and addressing issues as they arise. 

How often should you change spark plugs on a Lexus IS250?

every 100,000 miles
Generally, for modern Lexus models equipped with iridium or titanium spark plugs, replacement is recommended every 100,000 miles.

How much to replace spark plugs on a Lexus IS250?

The cost to replace the spark plugs on a Lexus IS250 typically ranges from approximately $800 to over $2,100, depending on the year, parts, and labor rates. For specific years, estimates show an average cost around $1,200-$1,300, with the shop or dealer price potentially reaching up to $2,100 or more. DIY replacement can save on labor costs, which are often estimated between $330 and $400. 
Estimated cost breakdown

• Parts: The cost of the spark plugs themselves is relatively low, often quoted at around $12 per plug, but this is before installation, taxes, and dealer charges. 
• Labor: Labor can be a significant part of the total cost, with estimates for the work alone ranging from $330 to $400. 
• Total Cost: The final price is a combination of parts and labor, with different factors leading to a wide range in estimates. For example, a quote of $850 was mentioned for spark plugs and carb cleaning, while other estimates suggest a much higher total, reports Reddit users. 

Factors that influence cost

• Vehicle year: Older models may have different labor times or part costs, with some estimates showing a higher cost for certain years. 
• Location: Prices for parts and labor can vary depending on your geographical location.
• Shop vs. DIY: You can save on the labor portion of the cost by doing the replacement yourself if you have the right tools and experience, notes this YouTube video. 

What to do

• Get multiple quotes from different shops or dealerships to compare prices.
• If you are comfortable doing so, consider a DIY replacement to save on labor costs.
• Be prepared for a higher price if you go to a dealer, as they may charge more for parts and labor. 

How much does Lexus charge to replace spark plugs?

The cost to replace Lexus spark plugs can range from $400 to over $1,100, with an average around $400 to $700 at an independent shop. A major factor is how accessible the spark plugs are—some Lexus models, like certain IS and ES sedans, have spark plugs buried under components that add significant labor time and cost, potentially pushing the total well over $1,000. 
This video explains how to save money by replacing spark plugs yourself: 1mScrew This!YouTube · Sep 6, 2023
Cost breakdown

• Parts: 6 to 8 spark plugs, which can cost around $10 to $25 each depending on the material (e.g., iridium or platinum), plus any necessary gaskets or other parts. 
• Labor: The price is highly variable, depending on how long it takes to access the plugs. It can be as low as a few hours or several, pushing the cost up significantly for models with more complex engine designs. 
• Dealer vs. independent shop: Dealerships typically charge more, while independent shops can offer more competitive rates. You may find an independent shop willing to do the work for $100-$200 in labor if the spark plugs are easy to access. 
• Other factors: The final price will also depend on your location and the specific parts (like OEM vs. aftermarket) used. If the mechanic recommends replacing other parts, like coils, at the same time, this will also increase the total cost.