This tool is especially targeted for the BMW car models and car radio that go with the BMWs. However cheap the new radio maybe there is a way to solve this problem for free. In that case, you will have to go to the store and replace the old car radio with a new one.
If you are the first owner of the car radio then good- hopefully, you keep the leaflet that was in the packaging box and there you can spot the car radio code. Of course, cars got more modern and car radios followed that trend instantly, the best way imaginable to increase the security and protection of the car radio devices was to put unique radio unlocking code.
PHILIPS: VW Alpha 4 and Gamma 4 (all version) CAR400, CCR600, CCR800 and other Philips models autodetected.