I think I answered my own question, but going to post here in case people have issues in future on same thing.
There was a Service Bulletin that came out "SI B 37 01 07"
SUBJECT
Knocking Noise from Front Suspension
MODEL
E70 (X5) with Sport Package Option Code ZSP
SITUATION
The customer may report a knocking or clunking noise coming from the front end of the vehicle while driving over bumpy roads or when making abrupt left or right turns.
CAUSE
The noise may be caused by a faulty spring accumulator for the front axle sway bar.
CORRECTION
In order to determine the source of the noise, remove the fuse for the Dynamic Drive (ARS) and drive
the vehicle.
If the noise is still present, please work through the related diagnostic path as described in Repair Instruction, RA 37 90 ... "Troubleshooting on Dynamic Drive (ARS)".
If removing the fuse for the ARS eliminates the noise, then replace the stabilizer bar as per Repair
Instruction, RA 37 11 010 "Removing and installing/replacing front active stabilizer".
Replacement stabilizers no longer utilize an external accumulator (1). Whenever a stabilizer with an external accumulator (1) is
replaced, then the ARS module must be recoded.
The necessary coding for the ARS module is available in
Progman under Retrofits by selecting "Stabilizer". After completing the Progman session, perform the Dynamic Drive Start Up Test, using DISPlus or GT-1.
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Looking at RealOEM, two part numbers were ended:
37104051997
37116781636
is now replaced by:
37116783037