Note: The following article is a best-effort reference for our customers and is provided "as-is" without any express or implied warranty. does not provide detailed troubleshooting as these are potentially complex tuner problems, not unlocking ones. Please proceed at your own risk.

Often after VIN unlocking an H&S tuner and installing on another vehicle, you may be greeted with an "Unrecognized Part Number xxxxxxx.MM or xxxxxxx.XP" error. This indicates the SD card present on the tuner does not have the required file on it to support the vehicle. In this case, you have two options. The first is to obtain an updated SD card with all of the files on it. The second is to open the SD card on a computer, find the closet matching file for your vehicle and rename/copy it.

A Youtube video is available illustrating how the second option works: