What are the reasons for replacing spark plugs?

[LaJayce]

The reasons for replacing spark plugs are: 1. Different spark plugs have a certain mileage limit, and they need to be replaced if the specified mileage is exceeded; 2. If abnormal phenomena occur in the spark plugs, such as electrode erosion, excessive carbon deposits, cracked insulators, or excessive gap, the spark plugs need to be replaced. The condition of the spark plugs affects the engine's power output—simply put, it affects driving performance. The driver may experience symptoms like lack of power; 3. When the engine malfunctions, such as shaking, poor acceleration, or difficulty starting, the spark plugs should be checked first. If the engine issues are caused by faulty spark plugs, they also need to be replaced.