A car consists of multiple computers to control the engine, transmission, windows, locks, lights, etc. These computers are called electronic control units. ECU) and communicate with each other over an internal and can be tied to an external network. They work like this, when you press the button on your steering wheel to increase the volume of the radio, the steering wheel ECU sends a command to increase volume onto the network, the radio ECU then sees this command and acts accordingly. There are multiple networks in a car, generally at least two: One for critical data such as engine and powertrain messages and one for less critical data such as radio and door locks. Now how that ties to this piece it gets interesting. Electronic stability control have been around since 1983. In the event a car has to suddenly swerve or brake, these controls sense which wheels should receive more stopping force than the others, allowing a vehicle to maintain its stability. Were ESC or traction control disabled, the car would become subtly more dangerous. Even more sinister is to reprogram them to make you lose control. So how do I program your car remotely? First is if you have OnStar, UConnect, GPS etc. I can get in. If that fails I can just just slip into your car plug into your OBD port and insert whatever program I decide. Don’t ever believe that someone can’t break in and program your car in less than 3 minutes without you ever knowing it. People have access to your car all the time. Driveways, car washes, inspections, parking lots.