Alarm goes off when heavy rain

[ksher]

The alarm went off 2 to 3 times when it was raining heavily. Did it happen to your E89? Does anyone know the cause? Will it be caused by water leaking from the gap between A-pillar and window glass into the car?

 

[ChuckB]

BMW will need to crank down the sensitivity of the alarm

 

[Wondermike]

Don't think water would cause it. What about motion sensors, was it getting blown about?

 

[ksher]

Don't think water would cause it. What about motion sensors, was it getting blown about?

Not sure. The motion sensors are at footwell area. What will trigger the sensors?

 

[Z4 Beemer]

No, not had this on mine. My understanding is that the interior sensor is volumetric so it would have to take a change in volume to set if off? :? Are you getting lots of water in at the a-pillar? :?

Mine seems to be quite sensitive about the bonnet being closed properly - sometimes complains after I've had it open to top up windscreen washer fluid. I usually need to make sure its firmly closed or else it warns me. Could it be something like that maybe triggering the alarm?

 

[Z4 Beemer]

Not sure. The motion sensors are at footwell area. What will trigger the sensors?

Where are the motion sensors? I thought they were up where the interior light is located?

 

[ksher]

Are you getting lots of water in at the a-pillar? :?

Water is only dripping down when the door is opened. But I think the black rubber trim along the top window frame should prevent it. The alarm only went off 3 times when it was raining heavily. No water goes into the car even I use pressure washer against windows at reasonable distance.

 

[ksher]

Not sure. The motion sensors are at footwell area. What will trigger the sensors?

Where are the motion sensors? I thought they were up where the interior light is located?

The owner manual says sensors detect movement in footwell area.

 

[Z4 Beemer]

Yeah - I always get a few drips of rain entering the cabin from the a-pillar when opening the door when the car is wet.

 

[shambolic]

Not had any alarm problems with rain or water.
Only when hosing to wash against the seal from back to front I get some ingress between front and back windows.
Only convertible I've had with no leaks so far