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T1mbo

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  1. 2017 4 series convertible upgrade to Kardon sound system

    T1mbo posted a topic in BMW 4 Series Forum
    Hi Guys, has anyone tried to upgrade the standard sound system to the optional Kardon one ?. I would like some info as to; 1) Do I need any additional wiring or is the loom already in place. 2) What are the part number(s) specific to the convertible version. 3) If not realistically possible - recommendations for an aftermarket alternative All replies gratefully received Cheers Tim
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