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Old 03-28-2014, 05:05 PM
racingbmwm3 racingbmwm3 is offline
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Location: Port Townsend, WA
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sorry, OBC = on board computer. Your on board computer is part of the factory NAV setup. In order to keep the functions in your instrument cluster, you need to locate an OBC from a non-NAV X5. Then figure out where to install it if you plan on putting in a double din radio.

here is a non-NAV X5 setup, you'd need the part with all the buttons. There's a couple threads here that describe how to keep the OBC after getting rid of NAV.
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