Thread: **Bluetooth Retrofit Guide** for TCU and ULF
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      07-22-2014, 05:00 PM   #121
datbimmer
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Drives: 335i m6t nav sport
Join Date: Dec 2013
Location: Canada

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I tried reading through the thread but I still am not sure. for a 07 335i which already has voice recognition, Do I need TCU or MULF ?
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