How often should the spark plugs of the Jetta be replaced?
2 Answers
The spark plugs of the Jetta are recommended to be replaced every 40,000 kilometers. Methods to determine if the spark plugs are damaged: Remove the spark plugs and observe them. The condition of the spark plugs can be judged based on their appearance and color. Normal spark plugs have a skirt insulator and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a skirt insulator that is reddish-brown, with an electrode gap between 0.8-0.9mm, and no signs of electrode burning. If the spark plugs are covered with oil or deposits but are not damaged, they can continue to be used after cleaning off the oil and deposits. If the spark plugs are severely damaged, with signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified, and after troubleshooting, new spark plugs should be replaced. Additionally, if the spark plugs appear black as if smoked, it indicates that the wrong heat range was selected for the spark plugs or that the air-fuel mixture is too rich, with oil seeping up.
Having driven the Jade for so many years, I've gained quite some experience with spark plug replacements. Generally, they should be changed every 60,000 kilometers or so, but this isn't a fixed number—it depends on actual driving conditions. For instance, since I often commute short distances in the city, spark plugs tend to accumulate carbon deposits more easily, so I check them in advance and replace them every 40,000 to 50,000 kilometers. If you have an aggressive driving style or frequently drive on highways, their lifespan can be extended. The material of the spark plugs is crucial; basic copper ones typically last about 30,000 kilometers, while premium ones like platinum can go over 80,000 kilometers. The consequences of not replacing them in time include a sharp increase in fuel consumption and difficulty starting the engine—I've seen plenty of these issues at repair shops, and it's really not worth saving on such small expenses. During regular maintenance, have a technician check the condition of your spark plugs to avoid the risk of major engine repairs, ensuring your car runs smoothly and hassle-free.
