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Yes, head unit only. I think technically it should be updated to the same i-level as the rest of the vehicle but I didn't do that, the one I sourced was pretty close and works fine. It's been a while since I did this, but from what i recall the donor CIC will work as soon as you plug it in but the feature set may be different (options like birds eye view parking, heated seat distribution, etc might not be there if the donor vehicle didn't have them). You can pull the VO and then code the CIC from inside of NCSExpert to restore the correct features. At that point, the CIC should be more or less functional but premium functions (nav, apps, etc) won't work. You either need to pull the certs from your old CIC and move them over or overwrite the root cert & generate new FSC codes which is what I did. I also updated the VIN just so it's correct, but if you go down the path of generating new FSC codes, I think it will work with the old VIN too. Getting the certs to work was a bit of a pain.
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