Car Alarms: Outback/Sebring Alarm Conflict, subaru legacy outback, chrysler sebring

Question
I'm living in a condominium unit where all the residents park in a common lot.  I own a 1997 Subaru Legacy Outback with a factory installed alarm system (no modifications), and my neighbor, two spaces down, has a Chrysler Sebring Limited (I don't know the year).  I can arm and disarm my alarm system without any problems, but whenver he arms his car, the radio signal triggers my own car alarm--whether or not my car is armed.

What are our options here?  Is this a problem with my car or his?  The simplest solution is probably just reassign our parking spaces, but I'm curious as to what's going on.

Thanks!

Answer
This can and does happen with common, older and
no code hopping systems. If it's an after market
system it's unlikely to happen, but if it's the Subaru
system (flashes headlights, and honks the horn), the
FCC says you must allow for the chance of 2 remotes
working on these basic systems. The reason at the time
was there were a limited range of frequencies,
car alarms/keyless entries having 12 of only 612 freqs.
offered for this type of device.

There will bound to be simular vehicles sharing
the base coded systems. It's problematic,
and inevitable. But allowed by law. :>(

The choices are to disable your factory alarm
by locating the green/lt. blue |-| wire
in the drivers kick panel, splice into it and
ground it out. This terminates the alarm.

Then put in a code hopping alarm with alot
more features that uses totally different frequencies
then the car manufacturers use. That solves this
issue for good.

That's what I know about these devices that
would be helpfull information to address it.

Good luck.

ALARMTEK
CARALARMMAN.COM