I'm just off the phone from talking to BMW HQ in Farnborough re when the new maps will become available. Apparently they are getting loads of similar enquiries. I'm told that it will be approx mid-January before map 2017-1 becomes available via Connected Drive. According to the chap I spoke to there were only two updates for 2016 - namely 2016-1 which my car came with in December 2015 and the current map 2016-2. It is not fixed that there will always be only two updates - there is no reason why some years there may be three or even four. I'm also told that the BMW numbering system does not match exactly the code numbers that may be available from other sources despite almost all of them coming from the same company - in The Netherlands I believe. My Garmin is already running 2017.20 maps so that confirms there is no correlation between the numbering system there. I last updated the maps in July to 2016-2 and it was very easy. I installed the BMW Update Manager from the Connected Drive website and simply followed the instructions. It first downloaded them to my laptop, then transferred them to a memory-stick - I used a 64GB one but 32GB would have been enough. I then popped it into the slot in the centre arm-rest, typed in the '1st -Time Security Code' and the car then installed them.