How many kilometers should spark plugs generally be replaced?
2 Answers
Spark plugs are generally replaced every 30,000 to 40,000 kilometers. Some original equipment manufacturer (OEM) spark plugs may be high-quality platinum spark plugs with a lifespan of 50,000 to 80,000 kilometers. When the OEM spark plugs reach the replacement interval, they should be promptly replaced at a repair shop. Typically, after 20,000 kilometers, the ignition gap of spark plugs increases, leading to a decline in ignition performance. Commonly known as spark plugs or "fire nozzles," their function is to discharge the high-voltage pulse electricity sent through the high-voltage wire, breaking down the air between the two electrodes of the spark plug to generate an electric spark, thereby igniting the mixed gas in the cylinder. The main types of spark plugs include: standard spark plugs, insulator projection spark plugs, electrode spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-gap spark plugs.
I've been driving for 20 years, and spark plug replacement is absolutely crucial. If not done properly, the car might stall halfway, which is really dangerous! Generally speaking, copper spark plugs last about 30,000 kilometers. If used beyond that, the ignition efficiency drops, the car loses power, and fuel consumption skyrockets. I make it a rule to check them every 30,000 kilometers and replace them if there's any wear—don't wait for problems to arise. If you switch to iridium or platinum spark plugs, they can last 80,000 to 120,000 kilometers, but it depends on your driving habits. If you mostly drive on highways, the spark plugs will last longer. When replacing them, I recommend going to a professional shop. They can use a wrench to remove them carefully—don’t risk breaking the ceramic part yourself. Safety first. Although small, spark plugs are connected to the engine's core. Regular maintenance can avoid major repair costs, saving you both hassle and money.
