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. 0 t3 I& y; d, [- F4 [Depends on how many function, one way or 2 ways etc.( Y3 H% ?# x6 u1 ]
Do you remember the style and look of the one you lost ?