If the button shortcut does not work, you must physically pull the radio out of the dashboard slot using radio removal keys or basic dashboard prying tools. Look for a white or silver sticker affixed to the top, side, or back of the metal casing. Look for a barcoded label.
If you’re locked out, the fastest safe path is Alpine support or a dealer. alpine radio code generator
For aftermarket Alpine units or older OEM units not covered by manufacturer portals, several reputable third-party services offer (typically $5 to $15 USD). If the button shortcut does not work, you