My car alarm seems to go off for no reason, any ideas? its happened four times in the last week
I have the same problem with my Z3 alarm going off, a local BMW specialist has traced it to the pitch sensor which has been damaged due to a water leak, the wires are also corroded. They have quoted £200 to fix it, but advise that the water leak is sealed first because it'll just get damaged again. I've had a look round and it appears the water is getting in by the off side light cluster via the boot gutter.
My remote control don't turn off the alarm, lock or unlock my z3,(yes i have changed the batteries)
Have a look in the boot for water, apparently the alarm Pitch Sensor can get damaged.Bmw priced this part at £278.71 and another £300+ to find where the water is getting in.
Check driver door module
SOURCE: My 2003 X5 alarm started
Try a new hood switch,the newer type is longer and prevents false alarms.
SOURCE: bmw alarm keeps going off
Had the same problem. I cleaned the bonnet open/close sensor located at the back left of the engine compartment, and sprayed it with wd40. Worked a treat for me. Another solution is to push you lock button twice. This turns off the interior movement sensor.
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have you tried disabling either the hood switch or trunk switch and leave it that way for a few days to see if one of these switches is causing the problem? each should have a disconnect that you can unplug.
easiest one should be the hood switch. look for the little plunger where it meets the hood, then follow the wire to the connector. if after a few days the alarm goes off, reconnect the hood switch and disconnect the trunk switch.
Is this a factory anti-theft alarm, or installed sometime afterward?
Have any of yuor neighbors recently installed any sort of high-powered radio equipment recently?
(CB's, amatuer radio, etc?)
Installed afterwards, the car was a gift
No but I will try this
Thanks for your help
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