Just stopped by the dealers. They have the part number in the system (I didn't write it down). Ironically it was shown as a 2009 part (but for a 10/09 production X5) with the old controller next to it too. This makes sense cuz that was about when the 2010 with the new iDrive system went into production.

The parts guys didn't have any knowledge of whether this is possible. He asked the service guys who said that it was not compatible with the CIC, CEC or something like that I didn't catch. He's still looking into it.

Uhm.. shouldn't the controller be the same for the X5 as the M3?

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2008 X5 4.8
White w/ Black Interior w/ Bamboo Trim | Premium | Sports + 214" | Tech | Cold Weather | Rear Climate | Premium Sound | Active Vent Seats | Heads-Up | Comfort Access | 3rd Row | Aero Kit | Huper Optik Tint | Clear Reflectors