if your car has not recieved any "hack installed remote door locks" then your problem is in the door lock cylinders - it has two contact switches that activate the central locking pump to lock and unlock and also activate the alarm.

It maybe that the wiring or contacts are flaky,

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)