Need more description to get an answer (how frequent, how loud, what pitch, sound metallic or dull, varies with engine RPM?)
But, what comes to mind for me based on what you've said is heater control valves - #5 on this diagram
https://www.realoem.com/bmw/enUS/sho...diagId=64_1665
They sit near the top of the engine compartment just fore of the brake booster area. They often seem to make a "thump" when cycling on and off. This happens when the engine is up to temperature and the interior climate control is calling for partial heat. They will thump once per second or so and if the interior is quiet it can be heard and felt. Pop the hood and check these out to confirm.
This isn't an F10 thing. My E39 had the same behaviour. There's some debate whether that indicates failure of the valve or not, since it seems to continue to work fine.