BMW switched the map data provider in 2010. Your 2009 disk was made by Navteq. The disks from 2010 on are made by Tele Atlas. So, there is a chance that the 2010 disks are correct for your roads with the 2010 disk. The bummer is that there is no way to find out without first buying the disks.

On the slight positive, both Navteq and Tele Atlas have web sites where you can report map data errors. I know from past experience that Navteq is very responsive. You might want to report the error on Navteq's site, even though it won't improve your disk, because the vast majority of GPS devices use Navteq data. If you get a Garmin some day, you would want the data correct. By the same token, if you get a new 2010 disk made by Tele Atlas, and it has the same error, report it on their web site, and it will probably be corrected in their 2012 release.

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