The TOAD Ai606 is the most troublesome, annoying unreliable alarm system I have ever encountered in any vehicle, 2 of my Coupes have had them, my 1st Broomer had a Clifford Concept - never gave me a days trouble in any aspect
Any future car I purchase with TOAD installed, believe me it's coming straight out
That would be your own personal opinion,
as an auto engineer/electrician and an audio specialist etc since 1986 I have to say toad /sigma alarms ARE probably one of the most [if not the most] reliable and rock solid alarms out there, bmw, Bentley [to name but a few used them as factory standard a few years back,] you might find that the cars circuits/switches need servicing/replacing /or the quality of the installer could be below standard. Also alarms should be serviced every year or two.