a custom instrument gauge module is disclosed which replaces the oem instrument cluster gauges sub - assembly and utilizes the original electronic circuitry for the unique customization of an existing instrument cluster . the custom gauge module is designed and calibrated to replace the original cluster graphics , gauges , and pointers , while maintaining the original cluster circuitry and , optionally , the molded housing . the flexible design and manufacturing of the custom gauge module allows the enhancement of existing instrument panels to have an upgraded appearance and additional functions , while maintaining and using the original cluster complex electronic circuit .