In my case and with the very same symptoms and after checking all the usual culprits, I discovered that I had broken wire under the rubber "snake" in the right rear upper corner (IIRC) when you open the trunk lid.
That wire leads to antena in rear window which is used by remote.

Post #35 here:
https://www.bimmerforums.com/forum/s...-issue)/page2&

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2010 BMW M6 * Black Saphire Metallic * Full Black Merino Leather
2019 BMW X3 M40i * Alpine White * Mocha Leather