When to replace spark plugs on Lexus?

Spark plugs are a critical component of a Lexus vehicle's engine, responsible for igniting the air-fuel mixture and powering the engine. Over time, spark plugs can wear out and need to be replaced to maintain optimal engine performance. The recommended interval for replacing spark plugs on a Lexus can vary depending on the specific model and driving conditions.

Typical Spark Plug Replacement Interval for Lexus

Most Lexus models recommend replacing spark plugs every 60,000 to 100,000 miles, or every 5 to 10 years, whichever comes first. This is a general guideline, and the actual replacement interval may vary based on factors such as driving conditions, engine type, and the specific recommendations from Lexus for your particular model.

Signs That Spark Plugs Need Replacement

Even if you haven't reached the recommended mileage or time interval, there are several signs that may indicate your Lexus needs new spark plugs:

• Decreased fuel efficiency


• Rough idling or engine misfiring


• Difficulty starting the engine


• Increased emissions or exhaust smoke


• Noticeable loss of power or acceleration

If you notice any of these issues, it's a good idea to have your Lexus inspected by a qualified mechanic, who can assess the condition of the spark plugs and recommend replacement if necessary.

Importance of Timely Spark Plug Replacement

Replacing spark plugs on your Lexus at the recommended intervals is important for several reasons:

• Improved fuel efficiency and engine performance


• Reduced emissions and environmental impact


• Longer engine life and reduced risk of costly repairs

By keeping your Lexus's spark plugs in good condition, you can help ensure your vehicle runs smoothly and efficiently for years to come.

What year to stay away from Lexus RX 350?

Years to avoid for the Lexus RX 350 include 2007, 2008, 2010, 2016, and 2017 due to common problems like oil leaks, engine issues, brake failures, and faulty sensors. The 2010-2012 models are particularly prone to a ruptured oil cooler line that can cause engine failure, while the 2007-2009 models had issues with cracking dashboards and a faulty brake master cylinder. The 2016 and 2017 models saw recalls related to airbags and issues with rain sensors, notes CoPilot.
 
You can watch this video to learn about the history of the Lexus RX 350 and common problems in different generations: 1mThe Miles DrivenYouTube · Dec 22, 2024
Years to avoid and why

• 2007–2009: These models are known for cracking dashboards and a faulty brake master cylinder that can lead to brake failure. 
• 2010–2012: A common and severe problem with these years is the oil cooler line, which can rupture and lead to engine failure. 
• 2016–2017: The 2016 model year had airbag recalls and was the first year of a new generation, which can lead to early bugs. The 2017 model had issues with the rain sensor and wipers, in addition to having its own airbag recalls. 

What to look for instead

• 2011–2015: These models generally have fewer issues, with the 2013–2015 models in particular being noted as more reliable. 
• 2018–2022: Models from these years are considered more reliable, especially those with the redesigned exterior. 
• 2020–2022: These are considered among the most reliable years, with the 2020 model year being a good choice. 

This video discusses the best Lexus RX 350 years to buy: 59sThe Miles DrivenYouTube · Dec 18, 2024

How much does Lexus charge to change 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. 

Do I really need to change my spark plugs at 100,000 miles?

Yes, replacing spark plugs at 100,000 miles is a common and often necessary maintenance task, as many modern vehicles have spark plugs rated to last that long. However, the exact interval depends on your vehicle's make, model, and the type of spark plug installed, so you should always check your owner's manual for the manufacturer's specific recommendation. 
This video explains when to change spark plugs and what happens if you don't: 1mHonest Mechanic ColoradoYouTube · Dec 24, 2023
Why it's important

• Engine performance: Spark plugs that are past their prime can cause rough idling, poor acceleration, and decreased fuel efficiency. 
• Preventing damage: Over time, worn-out plugs can put extra stress on other components, like ignition coils, and may seize in the engine block, making them harder to remove later. 
• Preventative maintenance: Replacing spark plugs is a form of preventative maintenance that can prevent more costly repairs down the line. 

This video explains why it's important to change spark plugs at 100k miles: 52sWhite One Auto, LLCYouTube · May 19, 2021
What to consider

• Owner's manual: Your vehicle's owner's manual is the most reliable source for the correct replacement interval and recommended plug type. 
• Spark plug type: The lifespan of spark plugs varies by material. Iridium plugs are often rated for 100,000 miles or more, while other types like copper or platinum have shorter lifespans. 
• Driving conditions: Severe driving conditions can shorten the life of spark plugs, so your interval may be shorter than recommended if you frequently tow, drive in extreme temperatures, or frequently start and stop. 

How often should you change spark plugs on a Lexus?

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.