To reveal a stereo code for most cars, you need the serial number of the radio. However, if your car is Renault, you can also get the activation code using the vehicle registration number or VIN.

How it works:
Calculate your car radio radio code without having to travel miles to a dealer. It works for most radios that need a code after a power outage. The unit's identification serial number is required, which you can find on display (for some models) or the rear label. See the exact details within the section of your car brand. You can get the code for free for some brands like Ford and Renault.