How Many Spark Plugs Need to Be Replaced at Once in a Car?

[VonValentina]

Cars require as many spark plugs to be replaced as there are cylinders. Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers, but this may vary depending on the brand and engine type. It is recommended to follow the owner's manual for specific guidance. The following standards can be referenced for maintenance 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, remove the plastic cover of the engine, and detach 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 firing order and secure the cover plate.