Modern vehicle security systems, particularly immobilizers, require specific security codes (PIN codes) to authorize the programming of new keys or the synchronization of electronic control units (ECUs). While original equipment manufacturers (OEMs) guard these codes closely, third-party tools have been developed to calculate or retrieve them. ICC (Immo Code Calculator) is one such tool. Due to its utility, older versions such as "V1.1" are frequently sought after by DIY enthusiasts and independent mechanics seeking a cost-free solution. This paper investigates the validity of these free downloads and the inherent dangers associated with their use.