Can the anti-theft code be retrieved from a working VW passat radio?
Unfortunately the code can not be retrieved from a working radio. If you can not find the code you have to get the serial number of the radio and call the dealer for the code.
Do you have the radio code first of all? otherwise it won't work later. Take off the ground cable first , then the positive (red). VW batteries have clamps on the bottom that must be unbolted. Rinse tray and clamps with baking soda water if corroded. Replace negative clamp last to avoid shorting battery by mistake.Reenter your radio antitheft code to make it work again.