I have been exposed to technical data re nuts/bolts, thread pitch, bolt strength, TTY etc. etc. This bolt is not TTY bolt from the look of it.
BMW engineers always overkill when writing technical manual for liability reasons.

The truth is: BMW enthusiasts, being enthusiast, read the repair manula like a Bible.

BMW mechanics: they re-use the bolts all the time.
The only time they use new bolts is engine head gasket job.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT