The immobilizer system basically confirms that your key is who it says it is. In short, if you got a duplicate key cut, great. But since it hasn't been coded to the vehicle, the car won't run. Hot wiring and jump starting can't cange this. No immobilizer, no go.
Very effective.
- Peter
I'm not crazy about screaming alarm systems, but did install a kill
> switch in our last car. We recently purchased a new 2003 Jetta GLS
> with am "immobilizer" system in it, which I gather has an ignition and
> fuel cutoff in it. Is a second electrical kill switch overkill or > worthwhile????
>
> What does the immoblizer system do, anyway??