Why Do Car Spark Plugs Need to Be Replaced?

[Patricia]

Reasons for replacing car spark plugs: Spark plugs operate in a high-temperature and high-pressure environment. After a period of use, part of the electrodes will be eroded, the electrode gap will increase, and the electrodes will oxidize. All these factors will shorten the lifespan of the spark plug until it can no longer produce a spark and becomes unusable, hence the need for regular replacement. Spark plugs are a crucial component of the engine's ignition system, and their primary function is to ignite the engine's cylinders. The combustion of the air-fuel mixture in the engine relies mainly on the ignition coil generating high-voltage electricity, which passes through the spark plug's center electrode to ionize the air and create an electric spark, thereby igniting the combustible mixture in the combustion chamber. Therefore, spark plugs are extremely important for the engine.