DIY Insturctions to replace L/R rear suspension air bags for X5 4.4i

Hello Everyone,

I have a 2003 BMW X5 4.4i. The "Selflevel suspension Inactive" light came on 4 days ago, with the rear of the truck sagging. Took it to Dealership for diagnostics and was told that the left and right rear suspension airbags are leaking. The Dealership is asking $1500 to replace both airbags.

I am contemplating doing the installition myself but not sure how complex it is to replace the rear airbags. Does anyone have any idea how complex this is? Also could someone please point me to the DIY for X5 Rear suspension airbag replacement?

Thanks for your time and assistance!
BenniX5