2007 BMW X5 NON-Air spring Suspension

[02gryx5]

So I have a little sag in the left rear of my wife's X5 4.8L. Anyone thats ever done a search on the internet regarding this issue, see's that it's all about a leaking bag or compressor..

So you can imagine my surprise when I had the rear end up and wheels removed... There are no air springs.

WHY AM I GETTING "SELF LEVELING SUSPENSION MALFUNCTION" CODE????

Does anyone have a NON-Air Spring suspension X5 and had this issue?

What suspension and/or sway bar can anyone recommend for the rear end so it Stands up right, and no sagging...

Thank you!