Owners of the 2021 Volkswagen Golf 8 have reported a unique bug. After a battery disconnect, the radio doesn't ask for a code, but the sound stops working, or the screen goes black except for the reverse camera. This is not a code issue. This is a software bug in the MIB3 system.
The era of writing a radio code on a sticky note in the glovebox is fading. For 2021 VW owners, unlocking your radio now requires the software equivalent of a dealer’s handshake. Treat your car’s electrical system with care, use a memory saver during battery swaps, and you’ll likely never see the lock screen again.