So today I called my sales guy and he said: "I have no idea, I get my information from you"
So I called BMWNA twice and spoke with two different reps. one said "I had to call a dealer in the area to see if they knew about it. Sales had no idea, so I spoke to service, they said that they had already installed it on several cars, so it definitely exists, I'm just not sure if it's under Z3B."
So between my dealer and BMW north america, no one gave me an answer.
Past:2010 MB C300 Sport
2001 BMW 330ci AA Supercharged
1999 Shelby SP360 #150