The car radio was changed for an improved model, i.e.The unit was changed under manufacturer warranty.There are a number of reasons why a radio code based on your vehicle registration or vin number may not work, including: However, receiving the radio code days later only to find that it did not work is yet another inconvenience. Once they do apply for the code, 9/10 times it will be based on the vehicle registration or VIN number of the car itself, which is fine if you have owned your car from new. Most vehicle main dealers will require you to book an appointment and take the car and paperwork (v5 logbook) into them before they apply for your radio code. More info about retrieving your lost Siemens VDO code.īy using our online Siemens VDO radio decoding service, you not only save yourself money, but also time and the additional hassle involved.