XSeries-forum

Good evening Ladies,
My E5 has recently taken to firing the alarm time after time.

I have looked around inside for bugs flying about or a rogue spider, but none of those.

It has become such a nuisance that I usually have to leave the vehicle unlocked.

I have chased the usual things like....
it has a recently new battery & holding good voltage, all door sensors work & trigger the interior light properly when opened, as does the tailgate, & I have given the bonnet sensor some abuse to see if it is that... & will disconnect it & see it that stops the issue.

Any one know of any other spurious reasons the alarm will trigger... ?

regards to all
Grant B

Previous reported incidents usually finger the bonnet sensor.

Mine went the same i just unplugged the bonnet sensor and no more fals triggers.

Any other symptoms that may not seem related? radio swapping stations, indicator sounder silent, when mine started throwing the odd wobbler it turned out to be the LCM starting to fail. First sign was running a Fault code read and no communication with the LCM which in turn prevents comm's with several units

UPDATE...
unplugged the bonnet sensor switch....
No more false alarms...
Thank you people, much appreciated.

Strang how that sensor fails i think it has failed on every car i have had.
I do tend to keep my cars a few years.

This brings back memories, had the same issue on an E53.

Alan Gunn wrote: ↑Tue Jul 13, 2021 6:04 am Strang how that sensor fails i think it has failed on every car i have had.
I do tend to keep my cars a few years.

It's maybe because you actually lift the bonnet unlike 99% of drivers these days lol

.........what? That big metal panel in front of me opens?

i pulled the sensor on Sunday evening & no false alarms since -
I prized it open, & pinned it out.... the connections were spotless, but the internals were plastic on plastic moving parts & were partially jammed in place & after i had it on the bench for a while, I heard it click... hence triggering the alarm...

X5Sport wrote: ↑Tue Jul 13, 2021 11:41 am .........what? That big metal panel in front of me opens?

Yes the front "boot* opens but you can't put any groceries in there as it's too hot

Thought it was a Dealer access only

well people... removing the bonnet/hood sensor switch definitely solved the false alarm triggers.
Many thanks for the input.

Have a great week
Grant B