Alarm issue HELP!!!

[Sam617]

I have a 2009 x5 4.8i and everytime I'd press the alarm it goes off. Anyone ever experience this? What did u do to fix it?

Thanks, Sam

[brian5]

You mean the button on the key fob to open the liftgate?

[Sam617]

When I hit the lock button on the key fob, the alarm goes beeping crazy

[brian5]

BMW says malfunctions like this can be as a result of "local radio waves".

Does your other key fob do this?

Does it do this when you're parked in a different location?

I wonder if your key fob battery is discharged. A long drive might help.

[Sam617]

Thanks Brian5 for your feedback, I just went outside to use the other key fob and the alarm works now. Lets see if this does the trick in the long run.
Thanks again!! Sam

[Sam617]

Well after a few days of using the of the two key fob, the alarm is going crazy again as soon as I press the lock button. Is there a sensor somewhere? Is there a battery I can replaced on the alarm?

Thanks, Sam

[edco]

I had a similar problem. There were 3 points of interest..
1) Battery. You car is a 2009. Battery is therefore 5 years old. Have you replaced yet?
2) Hood switch. PS of vehicle. Look for a button near the washer tank. Easy disconnect to determine if that makes a difference.
3) Roof sensor. This was the culprit on mine after I replaced 1 and 2 above.

Hope that helps
ed

[Sam617]

Originally Posted by edco

I had a similar problem. There were 3 points of interest..
1) Battery. You car is a 2009. Battery is therefore 5 years old. Have you replaced yet?
2) Hood switch. PS of vehicle. Look for a button near the washer tank. Easy disconnect to determine if that makes a difference.
3) Roof sensor. This was the culprit on mine after I replaced 1 and 2 above.

Hope that helps
ed

1) Battery never change, no sign of weak startup
3) Where is the Roof sensor

Thanks, Sam

[edco]

Originally Posted by Sam617

1) Battery never change, no sign of weak startup
3) Where is the Roof sensor

Thanks, Sam

1) Alarm going off IS a sign of a weak battery. Had nothing to do with startup. The system senses lower amps and begins to turn off (or reduce) power to non-essential services (like the alarm, radio, etc)
2) Center upper console (where the switches for the pano roof would be). Do a search for "Ultrasonic Passenger Compartment Motion Detector" As someone else pointed out, there was a recall for them being defective.