Here is a place that is testing and says soon selling them. YMMV.
The instructions are good.
Transfer Case Actuator Motor Gear
( view PDF instructions ) ( view instructional video )
This gear is located inside the actuator motor. We manufacture using a high temp nylon carbon fiber reinforced material which is self lubricating. Warranty subject to proof that all four tires replaced at once. See warranty section of website for further information. OE # for assembly: 27 10 7 566 296 Old #: 27 10 7 541 782 See our How To page for video instructions ***Currently in testing phase and should be available for purchase around 24 October 2012***
$125.00
Available Soon
Odometer Gears - BMW - X3 (E83-N) - X5 (E53) 1999-2010
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