How Many Years Can Original Spark Plugs Last?
2 Answers
Under normal maintenance conditions, automotive spark plugs should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is recommended to follow the user manual. Refer to the following maintenance standards for replacement: platinum spark plugs should be replaced at 40,000 kilometers, ordinary 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 cover of the engine, 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 external debris such as 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.
As someone who frequently repairs cars, I find that factory spark plugs typically last 3 to 6 years, depending on driving conditions. For example, if you drive daily in congested urban areas with frequent stops and starts, the spark plugs wear out faster and may need replacement in 2-3 years. If you mostly drive on highways, their lifespan can extend to 5 years or even longer. Additionally, maintaining the entire ignition system is crucial. If aged spark plugs aren’t replaced promptly, they can affect other components, such as ignition coils or throttle carbon buildup, leading to sluggish acceleration and increased fuel consumption. My advice is to inspect them every 40,000 km or so. If you notice delayed starts or unusual noises, don’t hesitate—replace them immediately to avoid bigger issues. Factory spark plugs are usually made of copper-nickel, which are affordable but less durable. Upgrading to higher-quality materials can extend their lifespan.
