2006 is250 alarm randomly going off

[Nicklb101]

Hi

Over the past three or four days. The factory alarm in my 2006 is250 manages to set itself off randomly throughout the day and night. No idea what is setting it off. I've tried locking it with the key, leaving it unlocked etc but it still manages to go off. Making it very hard to go anywhere to do jobs as I have to keep disconnecting the battery. Have called Lexus in Perth, Australia where I am based and they have said that in order to figure out the problem, they will need it in the shop to wait for it to go off.. At the price of $180 an hour so I am trying to find out if anyone has had a similar problem and would happen to know any causes and or fixes

cheers

[jamesm182]

Spider in the car?

[Nicklb101]

I've just sprayed the hell out of the inside and behind the wing mirrors cause I'm running out of options. Workshop had it the whole day today and they couldn't find anything wrong with it and apparently the alarm didn't go off. I really have no idea but it's really starting to get on my nerves. Anything else you can think of?

[jamesm182]

Faulty interior sensor? I if remember correctly there is also a way of disabling interior scan before you get out as a temporary solution?

[Nicklb101]

That doesn't happen to be the disabling of the intrusion alarm you are talking about? Cause I've turned it off but it doesn't seem to make any difference