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Just so, what navigation system does BMW use?

BMW's iDrive navigation system works with the vehicle to provide you with real-time information and displays the maps on a larger screen than you would get with a personal GPS system.

Also Know, how much does BMW Connected Drive cost? UPDATE 7/23/19: BMW's ConnectedDrive website is advertising fees of $80 for 12 months of Apple CarPlay service or a 240-month (that's 20 years) membership for $300. BMW will turn Apple CarPlay into a subscription service beginning with its 2019-model-year vehicles.

In this manner, can I update my BMW sat nav?

Go to your iDrive navigation view, open the settings menu and scroll down to Navigation system version. You will see the region, map version and year of your current map. If it's more than a year old, it's time to update. Due to this flexibility, BMW map updates are NOT sent automatically.

Can I install navigation on my BMW?

If your X3 does not have the pre-installed BMW navigation system but you still wish to add navigation to your car you have two options: use an aftermarket external dash mount GPS or an in-dash system. If you install it yourself, however, be aware that you may void the BMW warranty.