What is the radio unlock code for a 2001 Volvo v70 wagon?

There is no single unlock code. If there was a single code, it would defeat the purpose of a radio security code, as the code would be leaked or become well known after just a short period of time. There are many codes out there, and the best way to find yours is to either take your car to a dealer or call the dealer. Provide them with your VIN number, and they can tell you. In the Volvo Computer system, they can pull up a build sheet on your specific car. It will tell all of the options that your vehicle shipped with, and will also list the Radio Code. If your car was upgraded with a different Volvo radio, aftermarket, then the code they have on file will be invalid, and you will need to take it to the dealer. They will pull the radio and find the code based on a number printed on the back of the unit.