http://www.limitless.co.nz/ http://www.limitless.co.nz/ sells the cable + software for re-flashing a variety of ECU's. I think he makes the cables by hand (he a

http://www.limitless.co.nz/ http://www.limitless.co.nz/ sells the cable + software for re-flashing a variety of ECU's. I think he makes the cables by hand (he also started offering a nifty GPS + flashing unit as well). It's impressive work. It's quite easy to play with (and also quite easy to physically damage your car if you don't know what you are doing). Having physical access to the car would make it impossible to stop: It's relatively easy to replace the ECU in a vehicle, which would be essentially impossible to notice (in my cars case, it's tucked in behind the glove box). Then you could have much wider levels of control over the vehicle than an ECU would generally provide, by using your own custom hardware. I find it highly unlikely that the ECU would be networked (so to speak) with the car entertainment system (wireless/internet etc).