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Spark Plug Change Interval

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Old Mar 4, 2025 | 10:34 AM
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Default Spark Plug Change Interval
I have a six year old RX with 24,000 miles. The maintenance schedule calls for spark plug replacement at 72 months or 60,000 miles. I feel replacement would be premature. What say you?
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Old Mar 4, 2025 | 11:30 AM
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Originally Posted by RVAHoo
I have a six year old RX with 24,000 miles. The maintenance schedule calls for spark plug replacement at 72 months or 60,000 miles. I feel replacement would be premature. What say you?
I agree, too soon.
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Old Mar 4, 2025 | 11:52 AM
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That schedule is for environmental bs. Those plugs are good for at least 100,000 + miles.


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Old Mar 4, 2025 | 02:59 PM
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Keep on truckin'. I did some on a '19 350 with 90k miles and they still looked great.
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Old Mar 4, 2025 | 08:36 PM
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Remember the good ol’ days when plugs, points and condenser maybe lasted 25k miles, and tires might get 20k?

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Old Mar 5, 2025 | 11:01 AM
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I agree, to early and the plugs have only been firing, actual work for 24K u r about a quarter of the way there.
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Old Mar 5, 2025 | 12:16 PM
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Originally Posted by jcg0324
That schedule is for environmental bs. Those plugs are good for at least 100,000 + miles.
I don't think so. car care nut did a video on this and the interval changed betwen 2GR-FE -> 2GR-FKS. spark plug interval on the FKS is 60K miles, along with the hybrid engine.
Last edited by evident; Mar 5, 2025 at 12:31 PM.
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Old Mar 5, 2025 | 12:33 PM
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Originally Posted by evident
I don't think so. car care nut did a video on this and the interval changed between 2GR-FE -> 2GR-FKS. spark plug interval on the FKS is 60K miles, along with the hybrid engine.
Can you please share the link for that video.

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Old Mar 5, 2025 | 01:39 PM
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Originally Posted by MattRX
Keep on truckin'. I did some on a '19 350 with 90k miles and they still looked great.
Agreed. I replaced mine at 140k miles on an IS and 140k on a GS. No running issues and could have probably gone longer but definitely not 100% necessary unless you notice a driving issue IMO.
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Old Mar 5, 2025 | 02:35 PM
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Originally Posted by jollick
Can you please share the link for that video.


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Old Mar 6, 2025 | 06:26 AM
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Originally Posted by RVAHoo
I have a six year old RX with 24,000 miles. The maintenance schedule calls for spark plug replacement at 72 months or 60,000 miles. I feel replacement would be premature. What say you?
While mechanically the spark plugs are "probably" fine, the 72 month/60k interval is REQUIRED to maintain your Lexus Emissions Warranty.
  • Interval:
    The spark plugs should be replaced every 60,000 miles or 6 years, as required for Emission Control Warranty
Last edited by kmiller882; Mar 6, 2025 at 06:28 AM.
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Old Mar 6, 2025 | 08:39 AM
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Car Care Nut is a good channel for Toyota maintenance. I would follow his advice and change the plugs earlier than later. Save your receipts as the poster above said, to maintain the warranty.
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Old Mar 6, 2025 | 12:15 PM
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Has anyone here ever failed a state emissions test who has spark plugs beyond 60,000 miles on their RX 350?







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Old Mar 7, 2025 | 06:31 AM
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Originally Posted by jcg0324
Has anyone here ever failed a state emissions test who has spark plugs beyond 60,000 miles on their RX 350?
NEVER, in my 60 years of driving!
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Old Mar 7, 2025 | 08:48 AM
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Seriously!! these aren't our Granpa's cars!
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