How many kilometers should the spark plugs of the 2017 Passat be replaced?
3 Answers
Copper-core spark plugs are recommended to be replaced every 20,000-30,000 kilometers. Nickel alloy spark plugs have a slightly longer replacement cycle, typically around 40,000-60,000 kilometers. Iridium and platinum-core spark plugs have more stable metal properties and better oxidation resistance, resulting in a significantly longer service life. Platinum-core spark plugs are recommended to be replaced every 80,000 kilometers, while iridium-core spark plugs are recommended to be replaced every 100,000 kilometers. Below is some related information about spark plugs: 1. Spark plug classification: Spark plugs are categorized into resistor spark plugs, platinum spark plugs, and iridium spark plugs. Generally, resistor spark plugs have a lifespan of 20,000 kilometers, platinum spark plugs last for 40,000 kilometers, and iridium spark plugs can last between 60,000 to 80,000 kilometers. 2. Performance and efficiency: Spark plugs are a critical component of the car's ignition system, and the ignition system is vital for the engine's operation. Therefore, the performance of the spark plugs directly affects the overall working performance and efficiency of the vehicle.
I've been driving my Passat for five years. The 2017 model's manual clearly states the spark plug replacement interval is between 20,000 to 30,000 kilometers. Last time when I mostly drove in the city with frequent traffic jams and start-stop situations, I already felt sluggish acceleration and increased fuel consumption at just 25,000 km. Inspection revealed the spark plugs were burnt black. If you frequently drive on highways or drive gently, they might last just over 30,000 km at most. I recommend upgrading to better iridium spark plugs - though they cost 100-200 RMB more, their lifespan extends to 40,000 km. If you delay replacement too long, engine misfires and ignition problems will occur, and long-term repair costs will far exceed spark plug replacement expenses.
The designed lifespan of the spark plugs in this Passat is only about 20,000 to 30,000 kilometers. The factory-installed nickel alloy material isn't particularly durable. If you frequently drive short distances in the city, carbon buildup on the spark plugs will occur faster, and you might need to inspect and replace them as early as 20,000 kilometers. If you switch to long-life double iridium spark plugs, they can last up to 40,000 kilometers without issues. However, note that turbocharged engines have higher ignition demands—even a slightly larger spark gap can affect performance. A friend of mine waited until 35,000 kilometers to replace them, and the engine shook like it was dancing during cold starts.
