BMW X3 false activation of car alarm

Car: BMW X3
Variant: Diesel
Model Year: 2003
Categories: Electrics, ECU, Warnings & Lights
After arming the car with the fob, after a period of approximately 4 hours, the alarm activates itself.

I am now finding myself leaving my car unlocked to avoid having to go out and deal with the false alarms!!!!

Any ideas?
Posted: Apr 15, 2010 (14 years ago)
internal alarm battery flat i suspect. have it plugged in at bmw or reputable garage with suitable diagnostic gear to confirm.
Posted Apr 15, 2010 (14 years ago)
where is the internal alarm battery? can I change it myself?
if you have photo or diagram?
Posted Jan 14, 2014 (10 years ago)

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