Introduction
Use this guide to replace spark plugs for a 2019 Honda Civic.
Based on how often a vehicle is used and the kind of the car, spark plugs should be replaced in intervals of 20,000 to 100,000 miles. Old or damaged spark plugs ultimately cause engine damage. Hard starts, reduced gas mileage, engine misfiring, and lack of acceleration are the symptoms of defective spark plugs.
Before using this guide, make sure the engine and cylinder heads are cold. Also, make sure you repeat the steps for installing all four spark plugs before reinstalling the engine cover.
What you need
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Use a wrench to remove the bolts on the top of the engine cover.
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Remove the engine cover.
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