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Bumping this one. I'm considering this upgrade as a viable option for my 2011 135i with the base audio system. Coming from my previous vehicles with moderately upgraded setups, the base system is absolutely awful.
I have no issue doing the install myself. With that said, has anyone in the US successfully recoded the factory head unit to "hifi"? Per "VP Electricity's" post, it seems that the U.S. head units cannot be recoded. Can anyone confirm this?
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