The HP Tuners MPVI4 Credits are required to license your ECM and TCM before flashing any custom calibration through the MPVI4 interface. Each vehicle platform uses a specific number of credits, and once licensed, the ECM or TCM can be tuned, reflashed, or updated without buying additional credits for that module. Credits apply across a wide range of diesel and gas platforms, including GM Duramax, Ford Powerstroke, Ram Cummins, and many modern Global B and newer ECM architectures. Whether you are loading a custom file, adjusting shift behavior, or refining drivability, these credits serve as the licensing backbone for all HP Tuners MPVI4 workflows. How MPVI4 Credits Work Purchased credits are permanently tied to your HP Tuners account Credits are used to license ECMs, TCMs, and some auxiliary modules Once licensed, you can flash and adjust that module without extra credit cost Required for MPVI4 and RTD4-based diesel tuning Compatible with ECM unlocks where applicable When You Need Them Flashing custom Dieselr tune files Licensing stock modules before calibration Updating or modifying an already-licensed vehicle Working across multiple vehicles with the same MPVI4 Straightforward, essential, and required for all HP Tuners workflows—these credits ensure your MPVI4 device can write and manage tuning files correctly across supported platforms.
