Question about 2002 BMW 5 Series
Common fault is the bonnet sensor, when this happens to me I open the bonnet press the sensor plunger a few times, it fixes it for a while. Get this checked or replaced .
Posted on Sep 18, 2008
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Posted on Jan 02, 2017
SOURCE: Alarm goes off for no reason
If you can turn off the internal ultrasonic sensors (many cars allow this so that pets can be left in a car) it may solve the problem. If you can't winding a window down a little sometimes will help
Posted on Oct 03, 2009
SOURCE: car alarm goes off for no reason
There is probably a reason...I would look for bad grounds. A good place to look is at the battery terminal. Clean them and if the problem still exist, I would have an experienced tech look at the unit itself.
Posted on Oct 05, 2009
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.
Posted on Oct 26, 2009
Not a solution, but details about the same problem with my car: I have a 99 Lincoln Continental and have noticed correlations between certain conditions and the frequency of the car alarm going off.
When it is hotter outside, the alarm goes off more frequently than when it is colder.
The more of a slant the car is parked on, the more often the alarm goes off. My boyfriend's driveway is on an incline and any time I park my car there, the alarm will go off every 30 seconds. If I move the car to the level street, it doesn't go off at all. This has been noticed on other slanted places I've attempted to park as well.
Posted on Nov 12, 2009
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