Under normal circumstances, the normal service life of spark plug varies from 2000 km to 150000 km according to its material and production process. Because the working environment is very bad, the spark plug is very prone to failure and normal consumable failure often occurs, so it belongs to the "vulnerable consumable parts" of the car.

  Although today's cars are already equipped with advanced spark plugs, such as platinum spark plugs, there is no need to replace them frequently like the copper spark plugs in the past; But every once in a while, the part of the spark plug still needs to be checked. If the spark plug is rusted, the spark plug gap is too large, or the car has not been replaced after 50000 km, it is basically time to replace it.