True with older BMWs, not applicable with new cars. The "Pass Card" they give you in the new cars is nothing more than a worthless piece of paper, and its only there to prove you own the radio. There is no code required on any E38, E39, E46, E53, E60, E65, E85, and future models. Even at the very end of the E36 production run they dropped the use of a radio code.
Originally Posted by LDV330i
If the power to the radio gets disconnected or lost you will have to enter the Code before it works again.
My radio was replaced and they gave me a new Pass Card but did not ask for the old one.
2013 BMW 335xi Sedan
Estoril Blue / Black Leather
6MT, M-Sport, Premium Pkg, Cold Weather Pkg, Dynamic Handling Pkg, Tech Pkg, HK Sound, M Performance Exhaust, M Performance Power Kit
Former: 2011 335xi Coupe -- 2009 MCS JCW -- 2006 MZ4 -- 2002 325i -- 1997 318ti -- 1991 318i