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How do I know if I need spark plugs?

My car has been making some weird noises. I’m not sure why but I’m really hoping it’s nothing expensive. How do I know if I need spark plugs?

Bonnie Stinson · Updated on Jul 26, 2022

Reviewed by Shannon Martin, Licensed Insurance Agent.

Sorry to hear that! To know if you need spark plugs, keep an eye on your dashboard for a warning symbol—and stay alert to engine misfires.

Your CEL (

Check Engine Light

) may illuminate if you need new spark plugs.

In addition, here are a few key signs that indicate you may be due for new spark plugs:

Engine misfires

Rough and noisy idling

Difficult to accelerate smoothly

Louder than normal when driving

Reduced fuel efficiency (filling up your gas tank more often)

You don’t need to replace the spark plugs very often, so we recommend that you bring your vehicle to a skilled mechanic for assessment.

While most

policies won’t cover general wear-and-tear damage—like needing new spark plugs—it’s still a good idea to get coverage for emergency situations. For instance, it’s easy to get

roadside assistance

. The

app can help you assess your coverage options and look for the lowest possible rate.

Good luck!

MORE:

How to tune up a car

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Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.

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