It would work on a manual trans vehicle; you have to bypass the clutch neutral safety switch. Caution though, by doing so creates a safety risk, because of course if the owner leaves the trans in gear and tries to do a remote start, there's the possibility of starting the car and having it lurch forward. On a normal startup with a manual transmission, when the clutch pedal is depressed, it's also tripping the neutral safety switch to relay to the trans "safe to start".Yes, works only on cars with automatic transmissions. I tried to install on a manual to see if it would work and nothing. :headbonk: