Sudden alarm failure
 

Hi. 2004 X5 3.0 with 300,000km suddenly started wailing the alarm last night. Disarm and re-arm and it went off again. Tried opening and closing all doors and re-arming only to go off again.


Never has done this before. I was a bit annoyed so I left it unlocked on the street for the rest of the night.


One symptom I did notice, when arming, the clown nose on the rear view mirror blinked quickly a few times before setting into the normal flash every 4ish seconds. I didn't count the quick flashes. Maybe a clue?


TIA for any tips.

I had a lot of problems with the hood sensor tripping the alarm randomly. I disconnected it and never had the problem again. But that always happened in the hot sun on hot days.



Have you pulled codes? Also I think you can interpret those blinks on the clown nose -- Qsilver will probably produce the correct SOP for doing so, or you can try Google.

Sounds like the hood switch - just disconnect it until you can replace it. I used a cheap aftermarket switch that works WAY better than a defective OE switch... :thumbup:

Good plan. Tonight it armed without extra light flashes, and stayed silent. Switch may well be intermittent.

Very high probability that it is the hood switch. Mine failed at a police checkpoint when they closed the hood hard.[emoji849] Totally not nerve wracking while in the middle of the road, surrounded by five poorly trained cops armed with AMD-65's.... [emoji28]

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Is there any problem leaving it disconnected ?

Will it cause the anti-theft system to stop working ?

If it's just a wonky switch you can put a bulldog clip or tape on it if you don't want to keep it unplugged.

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Nope. The alarm will still work perfectly fine, just if someone opens your hood and steals your engine the alarm won't go off.



Personally, if someone steals my high-mileage M54, I hope they take the cooling system and CCV

:lmao: LoL..


E53 RiPPeR
XOuTPoST jUNkiE
ReVELaTiON 22:21

Here's a chart that indicates what the BMW DWA Status Flashing means:


http://bimmerboard.com/members/q/ori...us%20Flash.jpg




Here's a description of BMW's DWA (anti-theft alarm siren system):


http://bimmerboard.com/members/q/ori...tem%20Info.jpg


http://bimmerboard.com/members/q/ori...escription.jpg




E53 alarm system:


http://bimmerboard.com/members/q/ori...System%201.jpg


http://bimmerboard.com/members/q/ori...System%202.jpg


http://bimmerboard.com/members/q/ori...t%20Switch.jpg