False Activation of Car Alarm

2003 BMW X3 Diesel
Car: BMW X3
Year: 2003
Variant: Diesel
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?
Problem added: Apr 15, 2010 (13 years ago)
internal alarm battery flat i suspect. have it plugged in at bmw or reputable garage with suitable diagnostic gear to confirm.
Answered Apr 15, 2010 (13 years ago)
where is the internal alarm battery? can I change it myself?
if you have photo or diagram?
Answered Jan 14, 2014 (10 years ago)

This problem is archived

If you're having a similar problem please click below to re-post this problem, you can then customise it to suit your situation.

Helpful & Related Pages on AutoInsider

Parts referenced on this page