I went looking for the radio codes for a new Volvo V70 and learned from the service department that codes are no longer needed to activate the radio after installing a new battery. All new volvos excepy for the C series have the codes embeded on a flash chip that the car's central computer references. If the radio looses its code, the radio queries the flash chip, which then supplies the code. This is cool.

My radio will not work outside this particular car.

Thought you might like to know ...