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.6 i9 R+ U4 ^* j3 Q2 H6 P! P/ J$ X
Depends on how many function, one way or 2 ways etc. 0 K4 j7 r1 r5 |- t/ Z, x, W, N7 lDo you remember the style and look of the one you lost ?