In your service manual there's a 100.000 mile service.
Go over what's needed and instruct who's ever will perform
the service not to skimp on the requirements.

During that inspection and service other things may be discovered
and need attention. If so spend the money and get it done.
No need not to trust the Manual. After all that's where you're
going to find the directions for the service. Why would BMW lie about it?

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….