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Old 09-21-2006, 07:17 AM
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Brian-bmw Brian-bmw is offline
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The quick answer is that the X3 and E46 systems are the same. (Actually, the E38, E39, X3, X5, and Z4 systems are all the same). The iDrive E90 system is totally different.

You can upgrade the operating system with the the upgrade CDs in all of the E38/E39/E46/X3/X5/Z4 systems. Also, the E65/E66 systems are different from the E38... systems, but you can also upgrade that one from the OS disk as well. The E60/E63/E90 system systems get their software updates directly from the ProgMan computer rather than from an OS update disk inserted directly into the navigation computer. As a result, the software updates are not readily available to the common man and can only be done by a dealer.

Who knows why BMW changed the map format for the new systems. I believe that all of the new bodies use the new map format.
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