Recently I noticed my e90 328 with the n52 motor was not as responsive when accelerating as before. I figured maybe it’s time to do some regular maintenance. What I found was that the spark plugs were due for replacement. In this video, I show a side by side comparison of plugs I used for well over 100k vs new NGK plugs. This process applies to all vehicles makes and models.
![](https://i.ytimg.com/vi/O5hBm7hHSkI/maxresdefault.jpg)