How often should the ignition coil of a car be replaced?
2 Answers
Car ignition coils should be replaced every 100,000 kilometers. If they are damaged or aged, the owner must replace them. However, 100,000 kilometers is not a fixed replacement interval. Generally, as long as the ignition coil functions properly and shows no obvious signs of aging, replacement is unnecessary. As gasoline engines evolve towards higher speeds, higher compression ratios, greater power, lower fuel consumption, and reduced emissions, traditional ignition systems no longer meet the requirements. The core components of the ignition system are the ignition coil and the switching device. By increasing the energy of the ignition coil, the spark plug can generate sparks with sufficient energy, which is a fundamental condition for the ignition system to adapt to the operation of modern engines.
As a seasoned driver with years of experience, ignition coils aren't something you replace regularly like engine oil. Over the years, I've driven several cars, and most didn't show issues until 80,000 to 100,000 kilometers—it really depends on the car's condition and driving habits. For example, my previous SUV, which often went on long trips, lasted until 120,000 kilometers before needing a replacement. But if you're frequently stuck in city traffic with short trips, you might need to pay attention around 60,000 kilometers. Watch out for symptoms: difficulty starting, a sudden spike in fuel consumption, the car shaking while driving, or the engine light staying on. Once an ignition coil fails, the car won't start, leaving you stranded—especially dangerous on highways. I recommend having a mechanic check the resistance every six months during maintenance. Don't wait for a breakdown; damaging the spark plugs or catalytic converter along the way would be a bigger loss. Replacing coils isn't expensive—opting for branded parts is more reliable, costing just a few hundred bucks for long-term safety and peace of mind.
