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Originally Posted by NBTBRV8
I thought having read a few retrofit guides that it was simply plug and play between the two, but the above seems to suggest that the MKIV needs to be coded to the car. So my question is do I need to get it coded, or is the above in reference to a brand new unit without software loaded?
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If you purchase brand new, then the OS needs to be loaded and the unit coded as per the BMW instructions
If you purchase 2nd hand, then an OS will already be loaded and the nav likely to be coded for the prior vehicle.
Coding doesn't make such a huge practical difference, but you may find the nav may not properly be coded for your radio module. Also, it may not have the languages you want. In this case, my NavCoder software will code it for you.