DIY guide - 2014 Opel Corsa D 1.4: Diagnose and replace the coil pack

Our little Corsa started experiencing irregular RPM fluctuations and engine vibrations when idling. Closer inspection of the top of the engine indicated that high voltage from the cylinder 4 coil was shorting to the engine block instead of going to the spark plug, which meant we needed to replace the coil pack. Since the replacement operation is straightforward, in this video we also discuss how to diagnose a failing coil pack.

The OE part number for the coil pack is: Opel 1208093 / GM 55577898

Disclaimer: This video was made in the hope that it will be useful to other DYI-ers that work on the same vehicle model. The author of the video is not responsible for any kind of personal injury, property damage etc. that may arise if anybody tries to perform the same job on an identical or otherwise similar vehicle based on the contents of the video. Every DIY operation performed on your vehicle poses direct or indirect safety risks to you and those around you. Before attempting any such DIY job, please make sure that you have all the necessary tools, support and confidence to see it through successfully.