At what mileage should the spark plugs be replaced for a BMW 5 Series?

[RichardRose]

BMW 5 Series spark plugs should be replaced every 40,000 kilometers. The vehicle uses NGK platinum spark plugs, with the model number ILZKBR7B8DG. Spark plugs are a crucial component of the gasoline engine's ignition system. They introduce high voltage into the combustion chamber and create a spark by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. They are installed on the side or top of the engine, with the ignition coil directly connected to the spark plug. Replacement interval for spark plugs: Under normal maintenance conditions, they 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 owner's manual. You can 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.