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Posted on Jun 04, 2009
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97 bmw 528i factory alarm goes off for no reason

Is there a code such as turn key on off 3 or 4 times to reset alarm. The factory alarm goes off about 20 minutes after setting it for no reason I even replaced the battery and still does it , Then put it on a scanner and NO codes come up , What to do ? Tony in MN Thank you if you can help me .

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  • Posted on Jun 13, 2010
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Joined: Aug 19, 2009
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Disable the hood microswitch. just unplug it. That and the cabin sensor are the most probably reasons the alarm will go off.
Alarms are useless. Totally effin useless. So it goes off.....then whaddya going to do. Shoot someone? Call the police? or listen to it drain the battery over and over again.
But....you can't disable the alarm totally. The bmw engineers have tied it into the main computer. you can however disable the sensors one by one so it doesn't set off the alarm. Hood sensor....Hood sensor....that's the culprit.

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