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Agreed, the whole thing turned out much more pricey than I expected, but such is life with early adoption of retrofits. The controller is pretty big, so a lot of ceramic. Comparatively speaking it probably has 3 or 4 times or more the ceramic of all the other controllers combined (including the previous iDrive controller in the comparison). Sorry, I didn't write down the part numbers. I did query them when I first got them and they checked out as appropriate BMW OEM parts, but didn't record the numbers.
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