We had a similar issue with our X5. The driver side air seemed perfect and in-sync with the display, but the passenger side was a different story. I would set the A/C to 60 and it would still be warmer than the driver side set at 72.

It did get a bit colder over time, but once we got a freon recharge, everything was fine.

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Future Mods - In 2-3 Years
Fender Flares
Black Running Boards ... and some performance items