The immobilizer system acts like a password for your vehicle, ensuring that only the correct key can start the engine and protect against unauthorized access. A vehicle without an immobilizer system is highly vulnerable to theft, as it lacks the advanced security measures needed to prevent unauthorized engine starts. Without this crucial system, anyone with access to the car could potentially bypass its defenses and drive away. As the years go on, contemporary methods used to synchronize this system are only getting more complex. These methods vary depending on the vehicle's year make and model, and how many keys are available currently. All key programming will require the immobilizer module of the vehicle to be sent to us, along with other ECUs, if necessary.