How to update my x4 device. how to update my x4 device: 1. make sure you have the sct updater software installed on your windows pc. you know you are done when sct device updater displays "device is up to date!" about sct customer service about sct home company careers dealer. It is suggested to always return your vehicle back to stock and check for automatic updates prior to loading new tunes on your device and flashing your vehicle.. This video shows you how to install the sct device update software..
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