Wednesday, October 8, 2025

When to change spark plugs?

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Spark plugs are an important part of your vehicle’s engine, and their proper operation affects fuel efficiency and overall vehicle performance.

In this article, we’ll look at when to change spark plugs to keep your engine running optimally.

Regular check of spark plugs

Checking the condition of the spark plugs is an important part of the regular maintenance of your car. Car manufacturers generally recommend checking and, if necessary, replacing spark plugs after 30,000 to 100,000 kilometers. But specific intervals can vary by car make and model.

Age of the car

The time of operation can also affect the need to replace the spark plugs. If your car has been used for several years and has a significant mileage. The spark plugs may wear out faster. Usually, a car that is more than 5–7 years old needs more frequent replacement of spark plugs.

Symptoms of spark plug problems

If your car begins to exhibit certain symptoms such as hard starting, rough engine running, excessive fuel consumption, exhaust smoke, or “the engine stalls” while driving. This could be a sign of a faulty spark plug. In this case, replacing them can significantly improve the performance of the car.

The importance of proper maintenance

Proper spark plug maintenance is critical to engine performance. Candles are responsible for burning fuel and creating the necessary ignition in the cylinders. If they are dirty or worn, this can lead to loss of power, increased emissions, and problems with starting the car.

Professional service

Changing spark plugs requires some skill and tools and is best done at an authorized service center or by qualified mechanics. They will be able to select the correct spark plugs for your vehicle and install them properly.

Final thoughts

Replacing spark plugs is an important part of car maintenance that affects its performance and reliability. By following the manufacturer’s recommendations and regularly checking the condition of the spark plugs, you can ensure the correct operation of the engine and extend the life of your car. You should not delay replacing the spark plugs if you notice any symptoms of malfunction, and you should always entrust this procedure to professionals.

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