If you are considering tuning then there is a cutoff point around june 2020 where BMW locked the DME. I don't have the exact details on my mind but if tuning is a thing look into this.
If you are considering 2016 vs 2017 is may be wise to look at the builtin cellular device and make sure it uses 4G instead of 3G. 3G cellular support is most likely terminated so in that case your car falls back to 2G which severely limits the online options of the car.
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