how much time to remove/replace alternator in bmw 2011 750i

The shops have guides for labor guides and pay for this service. Hours aren't the only thing to be aware of , it's the charge out rate for that hour. Certain garages and depending on where you are in the country will determine the hourly labor rate and can differ dramatically. But to give you an idea to remove and replace an Alternator in a 750i it can run between $700 and $1500 depending on the shop and for the new alternator.