May be the winds have been detected by your bmw. make sure all the windows are shut down. if the problem persists , visit a dealer.
Well the problem could be that you have a window down because bmw 7 series have the motion detector in the cars and wind can trip off the alarm. that could be the only thing i can think of that can be the problem. just try rolling up all the windows and close the sun roof.
CAR ALARM ISSUES
It
can be any of the car doors not got properly locked or the door is locked but
the switch is not sensing the door locked. Open and close each door again
properly.
Or
else its problem with any of switch wiring getting in contact
with alarm wiring causing it to happen.
And
last thing alarm connections need to be inspected. It's getting short somewhere
in between.
There
are few help links with solutions, to troubleshoot these types of problems.
I suggest going through these links.
Click
the link below: ------
------------------
http://technoanswers.blogspot.in/2012/07/alarm-keeps-going-off.html
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http://whatisbyme.blogspot.in/2012/04/2009-toyota-camry-hood-switch-causing.html
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http://technoanswers.blogspot.com/2012/01/ford-pickup-alarm-will-not-disengage.html
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http://www.howtorepairguide.com/2012/11/mitsubishi-diamante-factory-security.html
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http://repairhelpcenter.blogspot.com/2012/01/toyota-avalon-factory-alarm-will-go-off.html
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http://schematicsdiagram.blogspot.com/2011/12/chevrolet-tahoe-hood-open-warning-on.html
-----------
These
details will help.
Thanks.
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I have the same car and the same symptom. Other forums say it is the hood switch/sensor. The BMW Store insists that it is a faulty siron and the internal siron battery. Siron replacement is over $1300.
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