imobilizer + 2 way data link functions?

Just to clarify something: an "immobilizer" is a system built into the car from the factory that will not let the car start without a proper key. What you're referring to is an "immobilizer bypass module", an accessory used when installing a remote starter. Bypass modules actually can do the functions you have listed, and make remote start/convenience features much easier - however there are important details you should consider such as: 1. Not all of those functions are going to be available on all cars. 2. The data-to-data cable between the remote starter and the bypass module won't work on every remote start, and on the remote starts where it will work it won't necessarily work every available function (for example data-to-data on Bypasskit, which I use, will not do progressive door unlocking, but connecting individual wires between the remote start and the bypass module will work that feature). 3. Generally you'll still have to connect a fair amount of wires to do a remote starter - ground, the wires to the ignition switch, the parking lights, the data interface wire(s) and on some cars the brake switch, tach, hoodpin, and more. However, using a good data bypass module will almost always significantly reduce installation time for a competent installer(it will still take 2 hours or so to do an average remote starter, even with a bypass module). 4. Bypass modules are a great time-saver for the competent installer, not a crutch for the incompetent.C Renner's Auto Electronix

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