I BOUGHT THE 2 AIR BAG SUSPENSION FOR MY 2000 BMW X5, HOW CAN I CHANGE IT?
Why? I certainly don't advise it, even if it were possible. If you want a machine to make all the decisions for you - ride in a cage.
It would be outlandishly expensive to design and build ABS for your bike.
Dude, even if you are only replacing what you think is a bad set of pneumatic springs (air bladder) I still would not recommend it since you could hurt yourself (aside from the mechanical hardships). I would suggest that you bring it to a real BMW shop who knows its business. And I hope that whoever diagnosed a bad air bladder was right in the diagnosis for both the dual and single axle self levelling suspension is a very complex system wherein problems can be due to a lot of single items or combination of items. And heaven forbid that you are trying to install pneumatic springs in a previously regular shock/coil type rear suspension. If so then you are hopelessly out of your league here.