3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
get hold of another unit and connect. if it works then your nav. unit is shot.i had the same problem with mkiii now i"ve just upgraded to mkiv.here in south africa no expertise to repair.i am sure you could repair yours.
if the plugs are the same then its just plug and play.my advice to you is to try and get someone to borrow theirs be it amkiii /mkiv to solve your nav.issue.if all goes well then go for it.however you might encounter one problem which is the nav.disc.one might be wired up for PROFESSIONAL or BUSINESS.take your VIN NO.to any agent and they will be able to tell you.
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