2010 2011 BMW 5 Series Forum F10
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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Navigation, iDrive, Audio, Video, Bluetooth, Phone, Coding Alarm Going Off (Maybe Sunroof)
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      09-29-2024, 01:16 PM   #1
STobe
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Drives: BMW F11 550i
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Angry Alarm Going Off (Maybe Sunroof)

Hey Everyone,

I’m trying to figure out why my siren keeps going off randomly (seems to happen a bit more when it rains). The outside lights don’t flash like they would if the alarm was triggered, but the red blinker inside goes off. However, it doesn’t match any known alarm codes. The siren will even go off when the car is unlocked and driving. It lasts anywhere from 5-15 minutes. I don’t think it’s a low voltage issue since the battery is new, coded, and I’ve been doing longer drives—not just short trips where it could be discharging.

Reinitializing the sunroof seems to help, but the sunroof keeps losing its initialization randomly, and I have to redo it. I can only reinitialize it about 50% of the time when the sunroof decides to work.

I already replaced the siren unit thinking it was the backup battery, but that didn’t solve the issue.

Any help is greatly appreciated... I do have ISTA+, but I haven't noticed any clear faults...
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