If you enter an incorrect code, the radio will lock you out to prevent theft attempts. "SAFE 2" Error

To use any code calculator, you must locate the radio's serial number. This number is never listed in the car manual for security reasons. You must look at the physical chassis of the radio. Tools Needed:

If you lost your radio manual, an software tool can help you recover it.

The chip's data file (a .bin or .hex dump) is extracted to a computer.

Finding your locked with a "SAFE" or "CODE" message is a common frustration after a battery change or power loss. This security feature is designed to deter theft by rendering the unit unusable without its unique 4-digit activation code.

Does not work for RCD 300 units made by Grundig or Visteon.

If you own a Volkswagen with the unit manufactured by Blaupunkt (often referred to as the "Blaupunkt 1" variant), you need a 4-digit code to bring it back to life.