Hi all!

I have a '92 525i which is originally from Japan.
Anyway, the stock radio/cd changer (Alpine I believe) works (although radio frequency is specific for Japan - only up to 90.0 FM).
I got the car without any owners' manual, much less, a security code for the radio.
My question is, do I assume correctly that the radio needs a security code? I am hoping mine doesn't as it does not have the "Anti Theft" label on the radio face.

Thanks for any insights.

Philip