Abstract: A wireless gauge, system, and method are provided for use in a vehicle. The system includes a transmitting device that transmits information about a vehicle wirelessly to one or more gauges. The system and method may be implemented such that it is unnecessary to cut through or otherwise extend additional wiring through a vehicle's firewall, but instead use an existing vehicle data port. Further, the add-on gauges do not necessarily require additional wiring from the vehicular data port or from the individual vehicle sensors unless desired. A computing device may also be included to configure the add-on gauge, such as by modifying the illumination, alarms, alarm set points, and the like.