might be alarm module gone haywire... or either got pest/insect bite ur wiring till haywire... try to check the alarm module c got any wiring loosen and got any bite mark.... if not send to familiar/recommended acc. shop for checking...

Within five minutes of getting my FLX home I'd had the displeasure of discovering it had an alarm, quickly followed by unplugging the noise box under the bonnet. Since then it still decides to quietly lock up and flash lights at whatever whim takes its fancy, I even find that hard to endure but at least happily the car salesman explained one thing to me, how to turn it off. I'm tempted to pull fuses marked alarm but sense that will be a fail.
I too would welcome tales of how to manage the alarm.

try use your other spare key to test.

yaya, i try b4 still the same

u ada replace any interior/exterior lights with led or not?
if yes check the room light, it may need to be replaced.

(well at least that was my problem)

ohh my tikus sifuuuuuuu.....
oic, thn if u staying ard klang valley or KL u can join our TT in Sri Petaling, we can help u check whats the problem if can..