My car alarm on Vauxhall Zafira keeps activating for no apparent reason. ?

I have been checking on this problem, there appears a couple of possibles :
The main car battery is getting ole and does hold its chrge well (the battery voltage dops back after running and the alrm see this as a tamper attempt and sounds the alarm.
The small rechargable batteries in the power sounder (mounted behind the wheel arch liner) can die of old age - the fix is replace the power sounder or if you feel upto it you can open up the power sounder and chnage the batteries
The bonnet switch (rear right of engine bay (viewed from front) especially on dark coloured cars due to heat expansion of bonnet

Timbo
July 2009

WE HAVE THE SAME PROBLEM NOW WITH OURS DESPERATE FOR ANSWER.DOES ANYBODY HAVE ANY HELP

DEK
June 2009