If you have the codes ( normaly 6 or 7 digits ) you can write them to the bike (2 pairs with a GS911) as posted by G5RJO .
Ounce you have the codes the wake up is not a problem.
Some of the car tyre shops carry the newer tps tools that will read the codes on the BMW bike sensors.
I have a friend who has one, holds it near the sensor and it displays the data, codes battery state etc.
If you have working sensors on the bike and know someone with a GS911 it is always a good idea to retrieve the codes for future reference.
If you purchase the sensors from BMW make sure the codes are on them. ( a separate sticker to the bar code usually on the potted / valve side)
I have known dealers to remove the code sticker so they can charge to have the sensors woken up.