Sounds like you may be in over your head if you need detail instructions to change a hose. Not trying to be rude, or discourage you, but it's as simple as disconnecting each end and removing the hose. Then filling and bleeding the system with the proper fluid. However, there may be lots of other things in your way that may have to be moved or removed.
ASE and BMW Master Certified Technician
This page is a good start for you: https://www.newtis.info/tisv2/a/en/e...mp-oil-supply/
Based on the image you shared, this is likely the specific hose: https://www.newtis.info/tisv2/a/en/e...supply/PTCkaV8
That said, if you're having a hard time figuring this out with the digital version of the service manual available (what I've linked), you probably should consider seeking professional assistance.
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