BMW makes it extremely difficult to install remote start on an F25. There may be one remote start solution out there, from Compustar. It wasn't available when I bought my X3, so I compensated by selecting heated seats and a heated steering wheel as options.
When you go thorough the Viper website and build your own system it allows selecting a 2016 X3 so there may be some hope there. I have NO experience with Viper, just recall folks being happy with them on RX350s as opposed to the Lexus remote start option.
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