look at the antenna ( usually next to rear mirror, or high up by the windshield, it should indicate a model number, with that go to internet to search, you can find it out an alarm system using same type of transmiter to match it.3 J# X! a4 O% f% \
Depends on how many function, one way or 2 ways etc. " e9 ?: H! Q) ?$ O9 CDo you remember the style and look of the one you lost ?