As their name suggests, spark plugs, the small, screw-like parts of an engine, create a spark of electricity that begins the combustion process to start a car. And let’s be honest: most drivers don’t think to replace them regularly. However, just because you don’t think about it doesn’t mean your vehicle isn’t suffering as a result unless you have a diesel engine. Like most car issues, there isn’t a universal number of miles that your spark plugs need replacing
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