How Many Kilometers Should a Car's Spark Plugs Be Replaced?

[JaceDella]

Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is recommended to follow the vehicle's manual. You can refer to the following standards for maintenance replacement: platinum spark plugs should be replaced every 40,000 kilometers, ordinary nickel alloy spark plugs every 20,000 kilometers, and iridium spark plugs every 60,000 to 80,000 kilometers. Spark plugs are a crucial component of a gasoline engine's ignition system. They introduce high-voltage electricity into the combustion chamber and create a spark by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Spark plugs mainly consist of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell. The main types include: standard spark plugs, projected insulator spark plugs, electrode-type spark plugs, seat-type spark plugs, surface-gap spark plugs, and surface-discharge spark plugs.