I just noticed a similar message in a 3.0 Si X5 courtesy vehicle I picked up from my dealer 2 days ago. Just returned it today but the same message was on about a "Malfunction in the Supplemental Restraint and Air Bags of the Passenger Seat but however advising the occupant to continue using the seat belts"

I mentioned it to the dealer and they informed me they were aware of it but had not yet corrected it

I have no idea what caused it FWIW.