I have the same problem, albeit intermittently, where the air on both drivers side outlets blow warm, but the air on the passenger vents is ice cold. I've read a couple of places it could be a low charge on the refrigerant or bad stepper motors controlling the drivers side vents. First and foremost, try vacuuming and blowing on the drivers side temp sensor on the CC panel.

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Gone, but not forgotten:
2003 X5 3.0i - 135k - the most expensive club in the world.
Premium, Cold Climate, Rear Climate

Service History

Mods and Retrofits: Satellite radio, MediaBridge, DEPO HIDs + LED AEs, M-B W164 rear-light mod, clear corners, BSW x108 Subwoofer System, illuminated door handles, titanium grill, compass/auto-dim mirror

Traded 9/1/16 -- 5UXFA53533LV80809 -- If you know his whereabouts, please contact me.