Still problems with theft alarm

N13GEY · March 28, 2020

I reported recently on an issue with the theft/ intruder alarm on my 2009 RX 350h

, acquired a month or so ago. I’ve now had 3 “spurious” alarms during the night when the car was parked on the drive. I’ve taken to switching off the theft alarm, remembering to switch it off each time a leave the car as it resets to ON as a matter of routine.I've no experience or evidence of say an animal jumping on the car and suspect there could be something wrong with the alarm itself. Is it possible to determine a component fault if connected to a diagnostic computor? Any other suggestions as to what to test/ investigate? Thanks for your help. Nigel. PS have spoken to the previous owner and he’s never had an issue!

GS300h2014 · March 28, 2020

Has it been very windy in your area recently?

PCM · March 29, 2020

17 hours ago, N13GEY said:

I reported recently on an issue with the theft/ intruder alarm on my 2009 RX 350h

, acquired a month or so ago. I’ve now had 3 “spurious” alarms during the night when the car was parked on the drive. I’ve taken to switching off the theft alarm, remembering to switch it off each time a leave the car as it resets to ON as a matter of routine.I've no experience or evidence of say an animal jumping on the car and suspect there could be something wrong with the alarm itself. Is it possible to determine a component fault if connected to a diagnostic computor? Any other suggestions as to what to test/ investigate? Thanks for your help. Nigel. PS have spoken to the previous owner and he’s never had an issue!

The cynic in me thinks, would the seller be 'honest'?

It's not a dash-cam falling down?

CCTV to check?

N13GEY · March 29, 2020

I believe the last owner was being honest.....

No dash cam fitted so not that.

Its not been particularly windy, here on the South Coast. In fact the last alarm occurrence was at 0400 and from memory the air was still. Im wondering if I might identify the cause of the fault by commecting it to a comptor? On an earlier BMW I owned you could identify an occurrence of a fault and not the cause of it.

I'm currently switching off the theft alarm as per the handbook so no alarms, at least as yet! Any further ideas would be welcome. Nigel

N13GEY · September 21, 2021

I have now found the cause of the spurious alarms. Nothing wrong with the car...it was a small field mouse that had decided to climb up into the car and run around the top of the dash! I installed a couple of humane traps and was able to evict the little blighter back into the Forest. I actually was directed the mouse route by a US You tube video! The producer of the clip had had a procession of "critters" getting inside his car/truck. So with this info I installed the trap and a favourable result was achieved! Moral of the story....check its not a mouse before further detailed (and no doubt, expensive) investigation! Nigel