Are Spark Plugs with Start-Stop Function Universal for Volkswagen?
2 Answers
Spark plugs are not universal. When replacing spark plugs, it's not only about their material and the number of electrodes, but the heat range of the spark plugs is also crucial. Each brand's heat range corresponds to specific vehicle models, so it's essential to ensure that the heat range matches your vehicle model when purchasing. Otherwise, it could lead to varying degrees of impact. Here's more detailed information: 1. Spark Plug Heat Range: The heat range of spark plugs is indicated by numbers, ranging from 1 to 9. Among these, 1-3 represent low heat range, 4-6 medium heat range, and 7-9 high heat range. Most passenger cars have spark plugs with a heat range between 5 and 7. 2. Choosing Spark Plugs with Different Heat Ranges: Selecting spark plugs with an incorrect heat range can easily affect the engine's performance and may even lead to the spark plugs failing prematurely. For example, if the original heat range of the spark plug is 7 and it's accidentally replaced with a spark plug with a heat range of 4, the spark plug won't have adequate heat resistance (high temperature). During continuous high-speed engine operation, the spark plug could easily burn out due to insufficient heat dissipation.
Spark plugs with start-stop function from Volkswagen are not necessarily universal. As an experienced auto mechanic, I can tell you that the start-stop system causes the car to frequently start and stop, subjecting the spark plugs to more heat and pressure, which can lead to wear and deformation. The original factory design takes this into account, using better materials such as iridium to improve wear resistance and ignition efficiency. Universal spark plugs may be cheaper but have a shorter lifespan, and frequent replacements can end up being more costly. I recommend checking the vehicle manual or using maintenance tools to find the correct model. Using the wrong spark plugs can lead to starting difficulties or engine shaking, affecting daily driving. Some car owners try to save money by using universal parts, only to encounter problems after 10,000 to 20,000 kilometers, resulting in higher repair costs. Safety first—dedicated spark plugs are more reliable.
