Forgive my contradicting a fellow crew member but when I used to have my OEM Japanese Alpine CM2191 unit, the 4-digit code was available at the dealer just by giving the dealer the VIN and proof of ownership.... the dealership ... "may" have the code providing it's the OEM radio
Kind Sir, I haven't be able to find the thread. Do you mind helping us out?There was a similar discussion here some months back. One of the knowledgeable members posted and answer, with a code that seemed universal and that would unlock a radio. I'd suggest a search. Best I recall it was a 4 digit code with instructions about the process, and it was successful for the person faced with the problem.