if you've got the optional honda alarm, it's probably the same one that's on mine. It's a cat1 alarm / immobiliser and it's made by a company called Hamilton and Palmer. the control unit for mine is under the driver seat - it's a black metal box bolted to the floor. it's a pretty good alarm - loud as fook... might be worthwhile giving H&P a call to see if you can just get a new fob. I had to get a new siren for mine and the tech guy I spoke to was really helpful. this is what the siren in