How Often Should Iridium Spark Plugs Be Replaced?
4 Answers
Iridium spark plugs should be replaced every 60,000-80,000 kilometers. Under normal maintenance conditions, automotive spark plugs are typically replaced after 40,000 to 60,000 kilometers of driving. However, this may vary depending on the brand and engine type, so it's recommended to follow the guidelines in your vehicle's manual. Here are some general maintenance standards for reference: platinum spark plugs should be replaced at 40,000 kilometers, standard nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000-80,000 kilometers. Steps for replacing spark plugs: Open the hood, lift the engine's plastic cover, and remove the high-voltage distributor wires. Make sure to mark each wire according to its corresponding cylinder position to avoid confusion. Use a spark plug socket to remove each spark plug one by one. While removing them, check for any external debris like leaves or dust and clean thoroughly. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to fully tighten it. Reinstall the high-voltage distributor wires in the correct firing order, then secure the cover plate.
Having driven sedans for many years, I've found that iridium spark plugs typically last between 60,000 to 120,000 miles, depending on the vehicle model and driving habits. For instance, with mostly highway driving, mine lasted up to 100,000 miles before needing replacement. However, with frequent stop-and-go city driving, they might need changing at around 60,000 miles. Symptoms like engine shaking, sluggish acceleration, or a sudden spike in fuel consumption shouldn't be ignored, as they can affect engine efficiency and even damage other components. Based on experience, I recommend consulting the vehicle manual or a professional mechanic to avoid delays. After installing new spark plugs, you'll notice better ignition response, slightly improved fuel economy, and an overall extension in engine life.
Bro, using iridium spark plugs is pretty hassle-free. In my daily driving experience, the replacement interval is around 70,000 to 100,000 kilometers. If you drive smoothly and avoid aggressive acceleration, they can last even longer; on the other hand, frequent racing might require earlier replacement. If you notice slow starts or increased engine noise, it's time to check them—don't wait until you break down. Replacing them can boost performance, making your ride smoother and more fuel-efficient. My advice is to combine it with your maintenance schedule and occasionally check the spark plug condition to ensure safe driving and save money.
Iridium spark plugs are durable due to their material and can last 100,000 to 200,000 kilometers. Key factors include fuel quality and driving environment; in urban high-emission areas, they may need to be replaced earlier. If ignition failure or abnormal fuel consumption occurs, prompt action is required. Personally, I believe regular inspection of spark plugs can prevent engine problems, and I recommend following the manufacturer's guidelines for maintenance and replacement.
