How long is the service life of an ignition coil?

Views: 45 Author: Alice Publish Time: 2025-06-09 Origin: Site

For car owners, to extend the service life of the ignition coil, on the one hand, they need to pay attention to the use of spark plugs. Using aging spark plugs will increase its working load. On the other hand, they should also pay attention to the water temperature of the car. If the water temperature is too high, the ignition coil is prone to burnout. The reason why it can transform the low voltage electricity in the car into high voltage is that it has the same form as a common transformer, with a large turns ratio between the primary coil and the secondary coil. However, its working mode is different from that of a common transformer. A common transformer works continuously, while the ignition coil works intermittently. It repeatedly stores and releases energy at different frequencies according to the different speeds of the engine.

When should the ignition coil be replaced? The replacement cycle still depends on the car owner. The ignition coil is a consumable item that needs to be replaced in time, just like spark plugs. When the engine is running, there is often a high-voltage pulse current of tens of thousands of volts on the ignition coil. Since it works for a long time in a high-temperature, dusty, and vibrating environment, it is inevitable that it will age and even get damaged. The aging and damage of the ignition coil will greatly reduce the ignition energy, causing the engine to consume more fuel and lose power. In severe cases, it will cause misfiring. This is a fatal failure for engines with a three-way catalytic converter. There is no need to replace the ignition coil and spark plugs at the same time. Spark plugs should be replaced about every 30,000 kilometers, and the ignition coil can be replaced at 100,000 kilometers if it is not damaged. Generally, if there is no problem, do not replace it. Nothing is better than the original one.