DIY'd BMW alarm goes off on its own

Flycaster · 12-23-2008, 05:53 AM

Three years ago, I DIY'd a BMW full alarm system into my 2005 Z4. Recently, the alarm has been going off by itself. After a couple of minutes it will turn off and leave my directionals blinking. I'm still under warranty, but I'm pretty sure that if I have BMW service look at it, they will charge me because they didn't do the install. Any suggestions as to what I can look for to fix the faulty alarm, before I try to do battle with BMW? Thanks.

Rick Hunter · 12-23-2008, 11:13 PM

Maybe double check the hood-sensor? I thought I read about those going dysfunctional first.

Flycaster · 12-24-2008, 06:24 AM

Yeah, got replies on other forums that it usually is the hood switch. So, I've disarmed that switch and have set the alarm. So far, after 24 hours, alarm has not gone off. I don't believe that disarming this switch will make a big difference in the car's sfety as I have another exterior motion detector that will go off if the car gets banged, trunk or hood opened and then closed. Sensor picks up undo vibrations.

12-23-2008, 05:53 AM	#1
Flycaster Flycaster 9 Rep 103 Posts Drives: '17 MB C300 coupe, '13 ATS 2.0 Join Date: Jun 2007 Location: Boynton Beach, FL iTrader: (0)	DIY'd BMW alarm goes off on its own Three years ago, I DIY'd a BMW full alarm system into my 2005 Z4. Recently, the alarm has been going off by itself. After a couple of minutes it will turn off and leave my directionals blinking. I'm still under warranty, but I'm pretty sure that if I have BMW service look at it, they will charge me because they didn't do the install. Any suggestions as to what I can look for to fix the faulty alarm, before I try to do battle with BMW? Thanks.
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12-23-2008, 11:13 PM	#2
Rick Hunter Skull Squadron Leader 304 Rep 2,031 Posts Drives: '07 M Coupé & '16 435xi GCoupé Join Date: May 2007 Location: The Emerald City iTrader: (20)	Maybe double check the hood-sensor? I thought I read about those going dysfunctional first. __________________
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12-24-2008, 06:24 AM	#3
Flycaster Flycaster 9 Rep 103 Posts Drives: '17 MB C300 coupe, '13 ATS 2.0 Join Date: Jun 2007 Location: Boynton Beach, FL iTrader: (0)	Yeah, got replies on other forums that it usually is the hood switch. So, I've disarmed that switch and have set the alarm. So far, after 24 hours, alarm has not gone off. I don't believe that disarming this switch will make a big difference in the car's sfety as I have another exterior motion detector that will go off if the car gets banged, trunk or hood opened and then closed. Sensor picks up undo vibrations.
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