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Spark plug change at 70,000 miles?

Tiny
MIKEHANNIGAN
  • MEMBER
  • 2007 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 70,000 MILES
The maintenance manual says the plugs should be changed at 120,000 or 12 years. This car isn't driven much so I have another 50,000 before I get to 120,000. But it's 17 years old on the original plugs. I feel like plugs don't really "wear out" due to age but I'm no expert. I'm feeling like just pulling a couple to see how they look, but maybe they should be changed?
Thanks!
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Friday, March 29th, 2024 AT 2:21 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,463 POSTS
The biggest thing with age is corrosion. They may not wear like they would in use but as they age, they can corrode and that can actually be worse than normal use. I would say to change them just because of that.
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Friday, March 29th, 2024 AT 5:13 PM

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