Here is a perfect example of a BMW N20 engine failure because of the lack of maintenance.
You can see on the third image, a bunch of granulated pieces and metal shavings, which resulted in a broken timing chain guides and chain failure. If you want to prevent this from happening, change your oil at minimum once a year or ten thousand kilometers.
Also try to forget about the ECO mode put your gear selector into sport mode and leave it in there.
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BMW Timing Chain Replacement