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How to Know When to Change Your Car's Spark Plugs

Model: (Various brands) Various
Part: Spark plugs

Video tutorial

The spark plugs in your car are very important components, so it is essential to carry out regular maintenance and replace them as soon as you notice any unmistakable signs of excessive wear. Worn and/or malfunctioning spark plugs can cause various problems, including loss of torque, limited range, and, of course, the appearance of the warning light on the dashboard.

But what are the signs that should alert the driver? As mentioned earlier, loss of power and torque is one of the easiest to notice, as you will immediately detect abnormal engine behaviour, which may suddenly struggle to deliver its full power. Additionally, you can also perform a visual inspection of the spark plugs themselves.


Updated on 9 June 2026 by ScegliAuto


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