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Q: Have original spark plugs in my 2009 Taurus with 129000 miles. Car runs good, gas mileage good. Should they be changed?

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Runs good. Gas mileage okay. Should they be changed? Approximately what's an average charge to change plugs?

A: If you have had the vehicle since it was ne...

If you have had the vehicle since it was new and never had the spark plugs replaced then I would recommend getting them replaced. You could have a mechanic like one from YourMechanic come to you and replace them. The spark plugs replacement is recommended to be replaced at 100,000 miles.

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