How Many Kilometers Should Iridium Spark Plugs Be Replaced?
2 Answers
Iridium spark plugs should be replaced every 60,000 to 80,000 kilometers. Under normal maintenance conditions, car spark plugs are typically replaced after 40,000 to 60,000 kilometers of driving. However, this may vary depending on the brand and engine type, so it is recommended to follow the instructions in the owner's manual. The following standards can be used as a reference for maintenance and replacement: platinum spark plugs should be replaced at 40,000 kilometers, standard nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. Steps for replacing spark plugs: Open the hood, lift the plastic engine cover, and remove the high-voltage ignition wires. Mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris like leaves or dust and ensure they are thoroughly cleaned. Place the new spark plugs into the spark plug holes, hand-tighten them a few turns, and then use the socket to tighten them further. Reinstall the high-voltage ignition wires in the correct firing order and reattach the cover.
My car uses iridium spark plugs. Last time at the repair shop, the experienced mechanic told me these premium ones can last a long time. Generally speaking, they're good for 60,000 to 80,000 kilometers, meaning you won't need to worry about them for four or five years. But this depends on driving habits – if you often drive aggressively or make frequent short trips with constant starts and stops, you might need to check them by 50,000 kilometers. Once, my friend's car had idle vibration issues, and upon inspection, it turned out to be leaking spark plugs. When replacing them, make sure to find a reliable shop where the mechanic will use a borescope to check electrode wear. Also, difficulty starting the engine in cold northern winters is another warning sign. Replacing them early can save you a lot on fuel costs, as poor ignition efficiency really guzzles gas.
