Posted on 4/28/2025
Spark plugs are a critical part of keeping your engine running properly. They ignite the air-fuel mixture inside each cylinder, firing thousands of times every minute while you drive. As they wear out, you may start noticing changes in how your vehicle performs. How long do spark plugs last, and how can you tell when it’s time to replace them? Here’s what you need to know. What Do Spark Plugs Actually Do? Each spark plug sits inside a cylinder and creates the spark that ignites the compressed air and fuel. This combustion is what powers your engine and keeps your car moving. Without properly working spark plugs, your engine may misfire, struggle to start, or run less efficiently. A healthy spark plug ensures the engine fires correctly, delivers maximum power, and keeps emissions in check. Typical Spark Plug Lifespan The lifespan of spark plugs depends largely on the type of plugs your engine uses: Copper spark plugs generally last ar ... read more